Mustapha Bamba, 24, was waiting for a bus at the Metro station and acting “erratically” Wednesday evening, according to Montgomery County Police Officer Rebecca Innocenti.
Bamba approached another man waiting for the bus and accused the man of talking about him, Innocenti said.
Bamba and the victim didn’t know each other, she said, but they had seen each other because they used the same bus to commute regularily.
“The same people ... take that route on a nightly basis,” she said.
As the two were getting in the bus, Bamba began punching the victim in the face multiple times, she said.
The victim, who had a pocket knife with him, stabbed Bamba in the leg, she said.
“The victim used the knife to defend himself to get the suspect away from him,” Innocenti said. Police got the call about a stabbing at the Metro stop about 5:41 p.m., she said.
Bamba suffered a puncture wound, and was taken to a local hospital for the injury, she said. He is charged with second-degree assault, she said. Police did not have an address for Bamba.
The man he assaulted will not be charged with anything, Innocenti said.