Gardai were called to a Dublin-bound Irish Rail service following an alleged fire on the train.
It is believed that a blaze onboard the train led to the chaos on the 19:00 Sligo to Dublin Connolly service.
Gardai rushed to the scene of the incident after the train stopped at Boyle in Co Roscommon.
The person was removed after they “vandalised the seating and flooring” and an extinguisher had to be used to “prevent damage”.
An Irish Rail spokesperson said: “An individual vandalised seating and flooring. The carriage in question was locked off, as staff used extinguisher to prevent damage.
“Gardai were called and removed individual at Boyle.”
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