Gardai at the Bridewell station in Dublin are questioning a 20 year old man about the rape of a Swedish woman near the Phoenix Park last month.
The woman, in her early 20s, was accosted by her assailant outside her front door in the North Circular Road area of the city.
He is believed to have followed her home and produced a gun at the door in the early hours of Sunday, January 28th. He then raped her at gunpoint in her home.
The man arrested on Saturday morning was detained under Section 30 of the offences Against the State Act because the alleged rape involved the use of a firearm.