A man was fatally injured at the commuter rail’s Uphams Corner Station in Dorchester Wednesday afternoon, which will lead to delays during the evening commute on the Fairmount Line, officials said.

The incident took place around 4 p.m. at the station, and Transit Police have shut down one of the tracks while they conduct a forensic examination, Transit Police Superintendent Richard Sullivan said.

One track will remain in operation, but trains will pass through the station at reduced speeds while the on-scene investigation is ongoing, he said.