Gardai in Dublin are investigating a car jacking in the city centre in the early hours of this morning during which a man was threatened.
At around 3am a 43 year old man driving a taxi picked up anothe rman on the Crumlin Rd and was told to drive to Dolphins Barn.
A short time later the passenger told the taxi driver to pull over, he said had a gun and an object was placed to the head of the taxi driver.
The passenger then drove off in the car.
A 24 year old man has been arrested and he's being questioned at Sundrive Rd Garda Station.
The taxi was later found abandoned in Ballyfermot.
No firearm has yet been recovered.
