british Transport Police are appealing for information following an incident on board a Pendle-bound train on Saturday night.,
Shortly before 10pm, officers attended at Church and Oswaldtwistle station and discovered a large group of youths behaving anti-socially.
A spokesman said: “The youths had boarded the train, a Blackpool South to Colne service, at Blackburn and during the journey had caused problems for other passengers and let off two fire extinguishers.
“We are now working with Lancashire Police and rail staff to trace those responsible.
“If you have any information about the incident, contact British Transport Police on 0800 40 50 40 or Crimestoppers, anonymously, on 0800 555 111.”