UPDATE: Distraught Johns Hopkins gunman killed himself, mother

BALTIMORE (AP) — The man who shot and wounded a doctor at Johns Hopkins Hospital and then killed himself and his mother was distraught over news of his mother's condition, Baltimore police said today.

Baltimore police Commissioner Frederick H. Bealefeld III said the gunman, 50-year-old Warren Davis, shot his mother, Jean Davis, in her hospital room. The doctor, who was not identified, had been telling Davis about his mother's condition when the man "became emotionally distraught and reacted ... and was overwhelmed by the news of his mother's condition," Bealefeld said.

He said he did not know what the woman was being treated for.

Davis then pulled a semiautomatic handgun from his waistband shot the doctor once in the abdomen, the commissioner said. After that, Davis holed up in his mother's hospital room for two hours.

When officers made their way to room 873, they found Warren Davis dead on the floor and his mother dead in her hospital bed.

The doctor, who collapsed just outside the room, underwent surgery and is expected to survive, police said. His name has not been released by police or the hospital.