BATON ROUGE, La. >> Dozens of people, many shouting angrily at officers, gathered at the scene of a fatal Louisiana police shooting tonight.

A Baton Rouge police officer was escorting a state Department of Children and Family Services case worker visiting an apartment complex when he got into a struggle with the man, who was shot and killed, Louisiana State Police spokesman Trooper Bryan Lee said. The officer suffered minor injuries.

East Baton Rouge District Attorney Hillar Moore III said a stun gun was deployed at least once during the struggle before the shooting, but he couldn’t specify how many times it was used or who fired it. He emphasized that the man was not handcuffed at the time of the shooting.

State police were called in to investigate the shooting, Lee said, and were still interviewing witnesses. He said investigators were reviewing footage from the officer’s body camera. He didn’t know whether the slain man was involved in the DFACS worker’s case.

Police tape covered the entrance to the complex in northern Baton Rouge, and about 100 people gathered on other side, some yelling “Black lives matter,” and “No justice, no peace.”

In July 2016, a white Baton Rouge police officer shot and killed a 37-year-old black man outside a convenience store where the man was selling homemade CDs. Two cellphone videos of the shooting of Alton Sterling, quickly spread on social media, sparking nightly protest in Louisiana’s capital city. Nearly 200 protesters were arrested in the days after that shooting.

Officials did not release the names, ages or races of the officer and the man he shot tonight.

Democratic state Rep. C. Denise Marcelle, who was a prominent figure after Sterling’s shooting, said she was trying to calm people down at the scene of tonight’s shooting.

“The emotions are extremely high,” Marcelle said. “A lot of people are kind of blowing it up.”

“I just wish that he did not have to kill him. I just wish there was some way it could have been avoided,” she said.

Baton Rouge Mayor Sharon Weston Broome expressed confidence that body camera video will “add value to the truth and transparency in this process.”

“My message is ‘Let’s wait for the facts to come out,’” she said.