LONDON (AP) — London’s police force said Sunday that some officers are refusing to conduct armed patrols after a colleague was charged with murder in the fatal shooting of an unarmed black man.

A Metropolitan Police marksman was charged Wednesday over the September 2022 death of Chris Kaba, 24. Kaba was killed after officers in an unmarked vehicle pursued and stopped the car he was driving. He was struck by a single bullet fired through the windshield as he sat in the Audi car.

The case renewed allegations of institutional racism within the London police department. Kaba’s family welcomed the murder charge against the officer, who has not been publicly named. He was granted conditional bail and is expected to stand trial next year.

Only about one in 10 of London’s police officers carry firearms, and the ones that do undergo special training.

The Metropolitan Police force said Sunday that “a number of officers have taken the decision to step back from armed duties while they consider their position.” It said officers were concerned that the murder charge “signals a shift in the way the decisions they make in the most challenging circumstances will be judged.”

The British Broadcasting Corporation said more than 100 officers had turned in their firearm permits and that police from neighbouring forces were called in to help patrol London on Saturday night.

Home Secretary Suella Braverman, who is in charge of policing for the UK’s Conservative government, said she would review armed policing to ensure that armed officers “have the confidence to do their jobs.”

“In the interest of public safety, they have to make split-second decisions under extraordinary pressures,” Braverman posted on X, formerly known as Twitter. “They mustn’t fear ending up in the dock for carrying out their duties. Officers risking their lives to keep us safe have my full backing, and I will do everything in my power to support them.”

Fatal shootings by police in the UK are rare. In the year to March 2022, armed officers in England and Wales fired weapons at people four times, according to official statistics.

It is also extremely rare for British police officers to be charged with murder or manslaughter over actions performed while they were on duty.

In one of the few cases in recent years, a police constable was sentenced in 2021 to eight years in prison for the killing of Dalian Atkinson, a former professional soccer player who died after being shot by a stun gun and kicked in the head during an altercation. The officer, Benjamin Monk, was cleared of murder but convicted of manslaughter.