An Aberdeen man was arrested following reports of an alleged disturbance on a train heading to the city.
British Transport Police (BTP) officers were called to Dundee Railway Station at 9pm on Saturday following reports of a disturbance on board a service travelling from Glasgow to Aberdeen on Saturday night.
The service was said to have been delayed for about 45 minutes while the incident was dealt with.
A 32-year-old man from Aberdeen was arrested on suspicion of using threatening or abusive behavior.
A BTP spokesman said: “We were called just before 9pm on August 20 following a report of an altercation between two men on a train between Perth and Dundee.
“Officers attended and arrested a 50-year-old man from Arbroath on suspicion of assault and using threatening or abusive behaviour.
“Another man, aged 32 and from Aberdeen, was also arrested on suspicion of using threatening or abusive behaviour.
“A report has been submitted to the procurator fiscal.”
A spokeswoman for ScotRail, which ran the service, said: “Alleged violence and antisocial behaviour of any kind will not be tolerated on ScotRail services and we are giving BTP all the support they need to investigate this incident.”