A man has been arrested after a taxi-driver was robbed at knifepoint in north Dublin this morning.
The suspect was detained a short time later during an operation involving members of the Armed Support Unit.
Gardaí were earlier alerted to reports of a robbery in the Poppintree area of Ballymun at around 1.30am.
A taxi driver said that he had brought a passenger to the area before the man threatened him with a knife.
During the robbery a sum of cash was stolen but the driver, who is aged in his 40s, was not physically harmed.
Investigating gardai quickly identified a suspect.
In a follow-up operation a man in his 20s was arrested at a property in the Ballymun area.
The operation was carried out by local uniformed gardaí, support by members of the Armed Support Unit.
A Garda spokesperson said: “He is currently detained under Section 4 of the Criminal Justice Act, 1984, at a Garda Station in the Dublin Region.
“Investigations are ongoing.”
The suspect can be questioned for a period of up to 24 hours before he must either be charged or released from custody pending a file to the Director of Public Prosecutions (DPP).