A man suffered head trauma Friday night when he apparently leaned into a moving Metro car as the train left the NoMa-Gallaudet station, transit officials said.

Investigators reviewed surveillance video which showed a Red Line train as it departed toward Silver Spring about 8 p.m., said Dan Stessel, a Metro spokesman. Authorities found the man, identified only as being in his 50s, on the station platform. He was hospitalized with serious injuries, Stessel said.

Witnesses told authorities that the man appeared to be intoxicated, Stessel said.

The train operator did not realize that a man had come into contact with the moving train and he did not stop, Stessel said. Officials single-tracked trains briefly at the station while police investigated.