Washington DC shooting: 1 teen dead and 3 others, including cop, injured

In another incident of fatal gun violence in the United States, a teenager has died and three others, including a police officer, were injured in a shooting in Washington, D.C., Sunday night (local time).

D.C. Metropolitan Police said a 15-year-old boy was shot and killed during the incident, and three adults were injured.

The D.C. Police Union tweeted that one of its members had been shot, was transported to the hospital "and is in stable condition."

The shooting happened during Moechella, which is described as an "Advocacy Festival Amplifying the Culture of Washington DC.