Four people were injured Thursday night in a three-vehicle collision in Southeast Washington, D.C. police said.

The accident happened near the intersection of Southern Avenue and Ridge Road about 9:30 p.m., said Officer Paul Metcalf, a spokesman. Four people were taken to a hospital, including one with potentially life- threatening injuries, and the others were in serious condition, he said. An infant was also a passenger in one of the vehicles, but the child was not injured, Metcalf said.

The cause of the crash is under investigation and no further details were immediately available.