Police in Hong Kong used pepper spray and made several arrests as dozens of protesters gathered Monday at a subway station to mark the anniversary of a violent clash last year that stirred accusations of police brutality during anti-government rallies.

Some protesters came to Prince Edward subway station in Kowloon with white flowers, while others chanted pro-democracy slogans and called for Hong Kong’s independence a year after video showed police using batons to beat people on a train.

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People place flowers outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020.  Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

Police in Hong Kong used pepper spray and made several arrests as dozens of protesters gathered Monday at a subway station to mark the anniversary of a violent clash last year that stirred accusations of police brutality during anti-government rallies.

Police officers stand guard outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

The semi-autonomous Chinese city experienced months of protests last year after the government announced plans to pass an extradition bill that would have allowed criminal suspects to be sent to mainland China for trial. Anger over the bill, seen as an infringement on the former British colony’s freedoms, sparked huge demonstrations that at times descended into violence, and rallies continued even after the bill was shelved.

A boy is escorted by police officers to a police van after he walked past the Prince Edward subway station where people tried to place flowers outside and the boy have released soon after, Monday, Aug. 31, 2020 in Hong Kong. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

“Police reiterate that we have zero tolerance towards any illegal acts and we will take enforcement action accordingly,” the statement said.

People holding flowers are questioned by police officers outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

People holding flowers are questioned by police officers outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

A woman holds flowers outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

A woman holds flowers outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

A protester gestures with five fingers, signifying the "Five demands and not one less" outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

A protester gestures with five fingers, signifying the "Five demands and not one less" outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

White flowers are placed against police officers outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

White flowers are placed against police officers outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

A protester gestures with five fingers, signifying the "Five demands and not one less" outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

A protester gestures with five fingers, signifying the "Five demands and not one less" outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

Protesters have accused police of indiscriminately attacking passengers on Aug. 31, 2019, while trying to arrest demonstrators at the station, where reporters and medics were refused entry after the clash.

People place flowers outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020.  Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

People place flowers outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

The semi-autonomous Chinese city experienced months of protests last year after the government announced plans to pass an extradition bill that would have allowed criminal suspects to be sent to mainland China for trial. Anger over the bill, seen as an infringement on the former British colony’s freedoms, sparked huge demonstrations that at times descended into violence, and rallies continued even after the bill was shelved.

On Monday, police raised a flag, warning those at the protest that they may be violating the city’s national security law, which bans subversion and secession. They used pepper spray to disperse the crowds and arrested at least 14 protesters between 16 and 60 years old on a range of charges, including unlawful assembly, disorder in public places and assaulting police officers.

Among those detained was a 17-year-old boy who claimed to be a reporter, according to a statement posted on Facebook by Hong Kong police.

Police officers stand guard outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

Police officers stand guard outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

“Police reiterate that we have zero tolerance towards any illegal acts and we will take enforcement action accordingly,” the statement said.

An additional 37 people were fined for violating social distancing rules that ban public gatherings of more than two people.

The protest comes amid Hong Kong's third and worst outbreak of the coronavirus, which has infected over 3,000 since early July.

A boy is escorted by police officers to a police van after he walked past the Prince Edward subway station where people tried to place flowers outside and the boy have released soon after, Monday, Aug. 31, 2020 in Hong Kong. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

A boy is escorted by police officers to a police van after he walked past the Prince Edward subway station where people tried to place flowers outside and the boy have released soon after, Monday, Aug. 31, 2020 in Hong Kong. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

People holding flowers are questioned by police officers outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

People holding flowers are questioned by police officers outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

A woman holds flowers outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

A woman holds flowers outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

A protester gestures with five fingers, signifying the "Five demands and not one less" outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

A protester gestures with five fingers, signifying the "Five demands and not one less" outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

White flowers are placed against police officers outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

White flowers are placed against police officers outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

A protester gestures with five fingers, signifying the "Five demands and not one less" outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)

A protester gestures with five fingers, signifying the "Five demands and not one less" outside the Prince Edward subway station in Hong Kong Monday, Aug. 31, 2020. Aug. 31 is the first anniversary of police raid on Prince Edward subway station which resulted in widespread images of police beating people and drenching them with pepper spray in subway carriages. (AP PhotoVincent Yu)