On the anniversary of another officer-involved deadly shooting, St. Louis city police shot and killed an armed black man while executing a search warrant on Wednesday, Police Chief Sam Dotson said at a news conference, according to KMOV.

The shooting occurred exactly one year after the shooting death of another black man by police, also on the city’s north side: Kajieme Powell, 25, was shot to death by police officers on Aug. 19, 2014, just 10 days after Michael Brown was shot to death by a police officer in Ferguson, a St. Louis suburb.

The slaying of Brown, who was unarmed, ultimately triggered protests and helped inspire the Black Lives Matter movement.

In Powell’s death, police say officers shot him because he was waving a knife at themProsecutors have not yet released their findings, according to the St. Louis Post-Dispatch, and the officers involved have not been publicly identified. To mark the anniversary of Powell’s death,  a crowd marched in downtown St. Louis on Wednesday to protest how officials have handled the case.

Wednesday’s shooting occurred about five miles from where Powell died a year ago.

Dotson told reporters that officers were about to search a home in north St. Louis when two armed men ran out the back door. In an alley near the house, one of the men pointed a gun at the two pursuing police officers, and the officers fired, striking the man, who eventually collapsed dead, Dotson said. Four shots were fired in total. The police officers were unharmed.

Dotson said the slain suspect, believed to be in his 20s, was carrying a 9mm gun with an extended magazine, which had been reported stolen from Rolla, Mo., a city 105 miles to the southwest of St. Louis.

The other man, described as an African American in his late teens, remains at large. 

Dotson said officers recovered three other guns as well as crack cocaine during the raid. About two years ago, he said, the same house was the target of another search warrant that resulted in “several guns” being recovered.

The north St. Louis neighborhood where the shooting happened has been host to several violent crimes in recent weeks, Dotson said, including the killing of a woman and a carjacking. “This is where officers needed to be,” he said.

“Detectives were looking for guns, looking for violent felons, looking for people that have been committing the crimes in the neighborhood,” he said.

A crowd began to gather at the shooting site Wednesday afternoon, some throwing water bottles at the police. More than 100 people were present when more officers arrived in an armored vehicle, according to the Post-Dispatch

Correction: An earlier version of this story had an incorrect description of Wednesday’s shooting incident.