The United Nations human rights office said it was “deeply alarmed” over violence against protesters in the Colombian city of Cali, where “police opened fire on demonstrators” and allegedly killed and injured several people Monday night.

The statement from the U.N. High Commissioner for Human Rights comes as antigovernment protests sparked by proposed tax increase enter their sixth day and show few signs of stopping.

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A police officer winds up to throw a stun grenade at protesters during a national strike against tax reform in Cali, Colombia, Monday, May 3, 2021. Colombia's President Ivan Duque withdrew the government-proposed tax reform on Sunday. (AP PhotoAndres Gonzalez)

The United Nations human rights office said it was “deeply alarmed” over violence against protesters in the Colombian city of Cali, where “police opened fire on demonstrators” and allegedly killed and injured several people Monday night.

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

The protests began after Colombia’s government proposed a tax plan aimed at raising $6.7 billion to pay the country’s debts and maintain a basic income scheme for 3 million low-income people that started during the pandemic.

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

In its statement, the UN urged Colombia’s government to protect the rights of protesters.

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

According to Colombia’s Human Rights Ombudsman, 16 protesters and one policeman have been killed in the demonstrations since last Wednesday. But that figure doesn’t include reports of deaths in Cali on Monday, which the U.N. said it is still trying to confirm.

A police officer winds up to throw a stun grenade at protesters during a national strike against tax reform in Cali, Colombia, Monday, May 3, 2021. Colombia's President Ivan Duque withdrew the government-proposed tax reform on Sunday. (AP PhotoAndres Gonzalez)

A police officer winds up to throw a stun grenade at protesters during a national strike against tax reform in Cali, Colombia, Monday, May 3, 2021. Colombia's President Ivan Duque withdrew the government-proposed tax reform on Sunday. (AP PhotoAndres Gonzalez)

The protests began after Colombia’s government proposed a tax plan aimed at raising $6.7 billion to pay the country’s debts and maintain a basic income scheme for 3 million low-income people that started during the pandemic.

President Iván Duque withdrew the tax plan on Sunday amid the protests and his finance minister resigned the following day, but large demonstrations and roadblocks have continued.

Numerous videos have emerged on social media showing police using excessive force during the protests and even shooting at some demonstrators point blank.

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

In its statement, the UN urged Colombia’s government to protect the rights of protesters.

“Law enforcement officers should abide by the principles of legality, precaution and necessity of proportionality,” the statement said.

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)

Soldiers and army tanks guard toll booths to keep protesters from damaging them, on the outskirts of Bogota, Colombia, Tuesday, May 4, 2021. Colombia’s finance minister resigned on Monday following five days of protests over a tax reform proposal that left at least 17 dead. (AP PhotoFernando Vergara)