Police were trying Sunday to determine whether a suicide was the cause of a train crash that killed six people and seriously injured 11 after an automobile stopped on the tracks.
Investigators were examining the wreckage to determine whether the vehicle had stopped because of a mechanical problem or whether the driver intended to place the vehicle at the crossing.
An off-duty police officer who witnessed Saturday's crash west of London said the car was stopped on a crossing in the village of Ufton Nervet when automatic barriers on either side of the tracks came down.
He tried to alert train operators by using an emergency phone at the crossing, but the locomotive struck the car before he could get through, an official said.
The drivers of the train and the car and four train passengers were killed in the crash.