Police are appealing for witnesses, after a passenger and rail conductor were threatened in Mirfield.
Police said a woman, 17, had been threatened on the 15.31 train from Huddersfield on Tuesday. When a conductor intervened he was also abused.
The suspect was of Oriental appearance and aged 27 to 30. Call 0800 555111 quoting number 359 of 24/11/2009.