More than 300 riders on a Virginia commuter rail line were evacuated from a train Tuesday morning after a man aboard made threats to other passengers, authorities said.

The incident happened around 7:30 a.m. near the Leeland Station as the train was bound for the District from Spotsylvania, Va. No one was injured.

It was not immediately known what the man said to others on the train. In a statement, Stafford County Sheriff’s Office said “numerous passengers observed his demeanor and heard his threats.” The train was evacuated as a precaution, VRE officials said.

The man was taken into custody and was expected to be interviewed by sheriff deputies and the FBI, officials said. K-9 units checked the train and found nothing. They were still checking the surrounding parking lot, sheriff officials said.

VRE brought in buses to get commuters to where they needed to go. It was not clear how long the delays will last. The incident is under investigation.

The commuter rail service runs lines from parts of Virginia into the District’s Union Station.