A man was arrested at Royston railway station at the weekend after allegedly exposing himself on board a train.
British Transport Police officers were called to the station shortly before 1pm on Saturday.
A force spokeswoman said: "A 25-year-old man was arrested on suspicion of indecent exposure, a racially aggravated public order offence, and being drunk and disorderly.
"He has been released on bail while enquiries into the incident continue."
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