A Muni Metro train struck and killed a man this afternoon at the Castro Station, San Francisco police said.

Muni halted train service in both directions between the Embarcadero and West Portal stations and moved passengers by bus. Train service resumed at about 8 p.m.

The victim was hit by an inbound train shortly after 4:30 p.m., police said. He was dead when officers arrived.

Officer Samson Chan, a police spokesman, said the accident is under investigation.

Sgt. Carl Fabbri said there is a surveillance video that likely would provide more information.

"There doesn't appear to be criminal activity," Fabbri said after a brief look at the video. Police had not identified the man late Thursday.

The Muni fatality is the second in as many days.

On Wednesday morning, a westbound 14-Mission bus struck Scott Whitsett, 49, of San Francisco, as he stepped off the curb about 11 a.m. near the corner of Mission and Beale streets. The bus pinned him against another bus, then ran over him when the buses separated.

He died at San Francisco General Hospital.