Body camera video released Friday shows Baltimore Police officers firing multiple shots at and killing a 17-year-old after they spotted a gun in his hands and chased him near North Stricker Street.

The teen, identified as William Gardner, was shot a dozen times, officials said Friday afternoon when they released the footage. He was pronounced dead at the scene Monday night. Police released the teen’s name, after state officials declined to earlier in the week, saying they were required by state law to do so.

Police Commissioner Richard Worley said the shooting was “truly a tragic incident” and noted that the department is conducting a thorough investigation.

It’s too soon to say whether the officers used excessive force, Worley said. The commissioner said the officers were chasing someone who was “clearly armed” and warned him numerous times to drop his weapon.

“We recognize that any use of force by law enforcement lends itself to a high level of public criticism. And so we take those concerns very seriously and are committed to continued conversation with the community,” Worley said Friday. “We don’t have all the answers today because we’re only a few days into the investigation.”

Baltimore Police have said officers saw the boy walking around 9:15 p.m. in the unit block of North Stricker Street showing “characteristics of an armed person,” and that he ran from them and displayed a handgun. Three officers opened fire, killing him.

The video released Friday shows two officers screaming at Gardner while he runs alongside their moving vehicle, ordering him repeatedly to “get on the ground” or “you’re gonna get shot.”

“I will shoot you,” one officer yells.

The officers fired as many as 21 shots, officials said. The officers began firing almost immediately after stopping their vehicle.

Gardner did not fire his handgun, but officials said it was loaded.

The department identified the officers as Detective Thomas Smith, a four-year veteran; Detective Shariff Kellogg, a six-year veteran; and Detective Devon Lomax, a four-year veteran. They’ve been placed on administrative duties pending the results of the investigation.

Along with the Baltimore Police Department, the Office of the Attorney General is investigating the shooting, in conjunction with Maryland State Police.