BALTIMORE (AP) -- Baltimore police officers responding to the sound of gunshots near an apartment building fatally shot a man who fired at them with an "AR-15-style" gun, authorities said early Friday.

No officers were wounded, police spokesman T.J. Smith said, adding it wasn't immediately clear why the man had begun shooting.

Four plainclothes officers riding in an unmarked car heard gunfire coming from the building on the city's west side Thursday night, Smith said. The officers drove toward the sound and when they arrived, they saw a man shooting an "AR-15-style" gun, according to Smith.

The man started firing toward the officers, and two returned fire, Smith said. The suspect was shot at least once and retreated to the apartment building, according to the spokesman.... Read More: WBAL