VANDALS smashed their way into a heritage railway carriage in a rampage of destruction.
They caused damage estimated at hundreds of pounds during the incident, at Oxenhope's Keighley & Worth Valley Railway station.
The three men were captured on security camera footage, which has been passed to the police.
Michael Tarran, a railway director, said: "The silly thing about it is that there wasn't even anything in the carriage worth stealing. It's beyond belief."
Mr Tarran said the vandals, described as men in their 20s, arrived at the station at about 5am on Sunday.
Two were on foot and one was riding a yellow-coloured bicycle which may have come from a Tour de France display.
First, they tried to break into a passenger carriages in a siding by throwing stones at its windows, but these bounced off, before they then found larger pieces of metal and threw them through the windows to gain access.
Mr Tarran added: "They smashed two windows. They also ripped off a board at one end of the carriage and broke that as well.
"They set off five fire extinguishers inside the coach. They threw two of those into the river. It's just wanton vandalism."
West Yorkshire Police said the suspects entered the Oxenhope railway station yard between midnight and 5.45am last Sunday, then broke into one of the carriages.
Witnesses should call police on 101 and ask for PC 2048 Irving.