Scores of people took to social media to complain.
Irish Rail is apologising to customers who had to stand in a crowded train for several hours in Portlaoise yesterday.
Passengers were moved from one broken down train to another to get them to Dublin's Heuston station after lengthy delays.
Scores of people took to social media to complain, with many concerned about a lack of social distancing.
Spokesman Barry Kenny says trains can travel at 100% capacity and that's why face coverings are mandatory. However they don't ideally want people standing on intercity services.
He says they're sorry for any discomfort passengers experienced in what was a difficult situation when the company wanted to avoid further delays to travellers. .