Gardaí are investigating two overnight pipe bomb attacks in Dublin.
In the first incident, a pipe bomb was pushed through the letterbox of a house on First Avenue, Seville Place in Dublin's north inner city shortly before midnight.
The occupants of the house picked it up and threw it out onto the street. It failed to explode.
The Army Explosives Ordnance Division was called to the scene. Bomb squad officers declared the device safe and the all-clear was given at around 1.20am.
An Army spokesman said this morning a subsequent examination of the bomb at barracks found it was a “viable improvised explosive device”. Gardaí had earlier said it was a hoax.
Meanwhile, a pipe bomb badly damaged a car in the Finglas area of Dublin at around 2.00am.
The car was parked parked in the driveway of a house on Glenhill Avenue when the device exploded underneath it.
Four people inside the house were unhurt.
The latest incidents bring the number of pipe bomb attacks in Dublin this week to four.
On Thursday night, a hoax nail bomb was found under a parked car on Kildare Road in Crumlin.
On Wednesday night, a pipe bomb exploded outside a house on Monasterboice Road in Crumlin. It had thrown from a passing car into the front garden.