The Boston Police Department reporst a man was shot around 7:40 p.m. on Wednesday just outside the Ashmont MBTA station.

Officers on patrol saw the shooting and immediately took off after the suspect on foot. Police say they captured Balfour McLean, 22, of Dorchester, on Alban Street and charged him with assault and battery with a dangerous weapon, illegal possession of a firearm and illegal possession of ammunition. They also recovered the Ruger 357 firearm they say he discarded during the chase.

The victim was taken to the hospital with serious injuries, but is expected to survive, police say.

Dorchester Avenue was shut for the investigation.