Prosecutors in Thailand on Tuesday charged four prominent pro-democracy activists with sedition and defaming the monarchy for their protest activities.

The case is the first of numerous ones lodged against participants in the student-led protest movement that is being prosecuted by the attorney general’s office. It also is the first in which the defendants are expected to spend significant time in jail, as suspects in other cases have usually been released after arrest.

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Activist Somyot Pruksakasemsuk, left Parit Chiwarak, and Arnon Nampha raise a three-finger salute, a symbol of resistance, as they arrive at Criminal court in Bangkok, Thailand, Tuesday, Feb. 9, 2021. Four activists, including Somyot, Parit, and Arnon, from Thailand's pro-democracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution. (AP PhotoSakchai Lalit)

Prosecutors in Thailand on Tuesday charged four prominent pro-democracy activists with sedition and defaming the monarchy for their protest activities.
Parit Chiwarak, and Arnon Nampha raise a three-fingers salute, a symbol of resistance arrive at Criminal court in Bangkok, Thailand, Tuesday, Feb. 9, 2021. Four activists, including Parit and Arnon, from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution. (AP PhotoSakchai Lalit)

The protest movement campaigned last year for Prime Minister Prayuth Chan-ocha and his government to step down, the constitution to be amended to make it more democratic and the monarchy to be reformed to make it more accountable.
Thai activist Somyot Pruksakasemsuk raises a three-fingers salute, a symbol of resistance, arrives at the criminal court in Bangkok, Thailand, Tuesday, Feb. 9, 2021. Four activists, including Somyot, from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution. (AP PhotoSakchai Lalit)

The legal aid group Thai Lawyers for Human Rights says at least 55 people have faced lese majeste charges since last November.
Thai activist Parit Chiwarak, raise a three-fingers salute, a symbol of resistance arrive at Criminal court in Bangkok, Thailand, Tuesday, Feb. 9, 2021. Four activists, including Parit, from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution. (AP PhotoSakchai Lalit)

“We have repeatedly emphasized that lese majeste laws have no place in a democratic country,” the U.N. experts said. “Their increasingly harsh application has had the effect of chilling freedom of expression and further restricting civic space and the enjoyment of fundamental freedoms in Thailand.”
Patiphan Luecha arrive at the criminal court in Bangkok, Thailand , Tuesday, Feb. 9, 2021. Four activists including Patiphan from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution.. (AP PhotoSakchai Lalit)

Patiphan Luecha arrive at the criminal court in Bangkok, Thailand , Tuesday, Feb. 9, 2021. Four activists including Patiphan from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution.. (AP PhotoSakchai Lalit)
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Activist Somyot Pruksakasemsuk, left Parit Chiwarak, and Arnon Nampha raise a three-finger salute, a symbol of resistance, as they arrive at Criminal court in Bangkok, Thailand, Tuesday, Feb. 9, 2021. Four activists, including Somyot, Parit, and Arnon, from Thailand's pro-democracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution. (AP PhotoSakchai Lalit)

Prosecutors in Thailand on Tuesday charged four prominent pro-democracy activists with sedition and defaming the monarchy for their protest activities.

Parit Chiwarak, and Arnon Nampha raise a three-fingers salute, a symbol of resistance arrive at Criminal court in Bangkok, Thailand, Tuesday, Feb. 9, 2021. Four activists, including Parit and Arnon, from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution. (AP PhotoSakchai Lalit)

The protest movement campaigned last year for Prime Minister Prayuth Chan-ocha and his government to step down, the constitution to be amended to make it more democratic and the monarchy to be reformed to make it more accountable.

Thai activist Somyot Pruksakasemsuk raises a three-fingers salute, a symbol of resistance, arrives at the criminal court in Bangkok, Thailand, Tuesday, Feb. 9, 2021. Four activists, including Somyot, from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution. (AP PhotoSakchai Lalit)

The legal aid group Thai Lawyers for Human Rights says at least 55 people have faced lese majeste charges since last November.

Thai activist Parit Chiwarak, raise a three-fingers salute, a symbol of resistance arrive at Criminal court in Bangkok, Thailand, Tuesday, Feb. 9, 2021. Four activists, including Parit, from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution. (AP PhotoSakchai Lalit)

“We have repeatedly emphasized that lese majeste laws have no place in a democratic country,” the U.N. experts said. “Their increasingly harsh application has had the effect of chilling freedom of expression and further restricting civic space and the enjoyment of fundamental freedoms in Thailand.”

Patiphan Luecha arrive at the criminal court in Bangkok, Thailand , Tuesday, Feb. 9, 2021. Four activists including Patiphan from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution.. (AP PhotoSakchai Lalit)

Patiphan Luecha arrive at the criminal court in Bangkok, Thailand , Tuesday, Feb. 9, 2021. Four activists including Patiphan from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution.. (AP PhotoSakchai Lalit)

The four -- Parit “Penguin” Chiwarak, Arnon Nampa, Somyos Prueksakasemsuk and Patiwat Saraiyaem, also known as “Mor Lam Bank” -- were denied bail.

Activist Somyot Pruksakasemsuk, left Parit Chiwarak, and Arnon Nampha raise a three-finger salute, a symbol of resistance, as they arrive at Criminal court in Bangkok, Thailand, Tuesday, Feb. 9, 2021. Four activists, including Somyot, Parit, and Arnon, from Thailand's pro-democracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution. (AP PhotoSakchai Lalit)

Activist Somyot Pruksakasemsuk, left Parit Chiwarak, and Arnon Nampha raise a three-finger salute, a symbol of resistance, as they arrive at Criminal court in Bangkok, Thailand, Tuesday, Feb. 9, 2021. Four activists, including Somyot, Parit, and Arnon, from Thailand's pro-democracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution. (AP PhotoSakchai Lalit)

The protest movement campaigned last year for Prime Minister Prayuth Chan-ocha and his government to step down, the constitution to be amended to make it more democratic and the monarchy to be reformed to make it more accountable.

The demand about the monarchy is the most radical and controversial, because the institution has been widely considered an untouchable, bedrock element of Thai nationalism. It has been considered taboo to publicly criticize the monarch, and insulting or defaming key royals is punishable by up to 15 years in prison per incident under a lese majeste law known as Article 112.

The activists focused late last year on the monarchy issue with speeches and activities that drew an increasing tough response from Prayuth’s government. After earlier pursuing other charges, it began bringing complaints of lese majeste against them. The charge had not been used for about three years at the request of King Maha Vajiarlongkorn.

Parit Chiwarak, and Arnon Nampha raise a three-fingers salute, a symbol of resistance arrive at Criminal court in Bangkok, Thailand, Tuesday, Feb. 9, 2021. Four activists, including Parit and Arnon, from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution. (AP PhotoSakchai Lalit)

Parit Chiwarak, and Arnon Nampha raise a three-fingers salute, a symbol of resistance arrive at Criminal court in Bangkok, Thailand, Tuesday, Feb. 9, 2021. Four activists, including Parit and Arnon, from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution. (AP PhotoSakchai Lalit)

The legal aid group Thai Lawyers for Human Rights says at least 55 people have faced lese majeste charges since last November.

Prayuth Petchkhun, a spokesman for the attorney general’s office, said that in addition to lese majeste, the four have been accused of sedition and violating the Act on Ancient Monuments, in connection with a rally held in a public field near the Grand Palace.

On Monday, U.N. human rights experts issued a statement expressing concern over Thailand’s increasingly severe use of the lese majeste law to curtail criticism of the monarchy. The statement followed the case of a Thai woman who was sentenced to 34 1/2 years in prison for material she reposted on social media.

Thai activist Somyot Pruksakasemsuk raises a three-fingers salute, a symbol of resistance, arrives at the criminal court in Bangkok, Thailand, Tuesday, Feb. 9, 2021. Four activists, including Somyot, from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution. (AP PhotoSakchai Lalit)

Thai activist Somyot Pruksakasemsuk raises a three-fingers salute, a symbol of resistance, arrives at the criminal court in Bangkok, Thailand, Tuesday, Feb. 9, 2021. Four activists, including Somyot, from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution. (AP PhotoSakchai Lalit)

“We have repeatedly emphasized that lese majeste laws have no place in a democratic country,” the U.N. experts said. “Their increasingly harsh application has had the effect of chilling freedom of expression and further restricting civic space and the enjoyment of fundamental freedoms in Thailand.”

The protest movement struck a chord with many Thais but alienated others, especially royalists shocked at its criticisms of the monarchy. The movement began to lose steam late last year amid differences among its factions, and because of a resurgence of the coronavirus in Thailand. Recently it has been overshadowed by anti-coup protests in neighboring Myanmar.

Thai activist Parit Chiwarak, raise a three-fingers salute, a symbol of resistance arrive at Criminal court in Bangkok, Thailand, Tuesday, Feb. 9, 2021. Four activists, including Parit, from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution. (AP PhotoSakchai Lalit)

Thai activist Parit Chiwarak, raise a three-fingers salute, a symbol of resistance arrive at Criminal court in Bangkok, Thailand, Tuesday, Feb. 9, 2021. Four activists, including Parit, from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution. (AP PhotoSakchai Lalit)

 Patiphan Luecha arrive at the criminal court in Bangkok, Thailand , Tuesday, Feb. 9, 2021. Four activists including Patiphan from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution.. (AP PhotoSakchai Lalit)

Patiphan Luecha arrive at the criminal court in Bangkok, Thailand , Tuesday, Feb. 9, 2021. Four activists including Patiphan from Thailand's prodemocracy movement reported themselves to the court on Tuesday as they are formally charge of defaming the monarchy, as the authorities step up legal actions against protesters accused of insulting the royal institution.. (AP PhotoSakchai Lalit)