A security sweep was carried out and a man in his 50s was arrested before the station was later declared safe.
A large scale security operation was launched yesterday, that saw Connolly Station in Dublin evacuated, after reports of a man with a shotgun.
Teams of armed gardaí were deployed to the scene after the suspect arrived on a train from Sligo.
It's understood that the man boarded the train in Maynooth.
Videos posted online show Gardai carrying the gun away as passengers look on.
A security sweep was carried out and a man in his 50s was arrested before the station was later declared safe.
Meanwhile gardai say they're aware of fake news being spread online in relation to the incident and are asking the public to independently verify information shared on social media and through messaging apps.