D.C. police identified the victim of a fatal police-involved shooting Tuesday afternoon in Southeast Washington.

Rafael Briscoe, 18, died after being shot by police in the 2400 block of Elvans Rd SE, said police spokeswoman Gwendolyn Crump. She said she did not yet know the victim’s address.

Officers from a gun recovery unit were working in the area Tuesday, police said. While on a patrol, officers encountered a male with a gun, D.C. police said in a statement. The statement gave few details of how matters unfolded.

Briscoe had a BB gun, D.C. Police Chief Cathy L. Lanier said Wednesday during an appearance at Mayor Vincent C. Gray’s weekly press briefing.

“Unfortunately, BB guns are designed to look like semi-automatics,” Lanier said, adding that an officer can’t tell the difference when making a “split-second” decision.

She said she did not know yet whether the suspect fired the BB gun.

Staff writer Clarence Williams contributed to this report.