Investigations have begun into two pipe bomb attacks in Dundalk, Co Louth.

The attacks are believed to be linked to a feud between gangs involved in the illegal drug trade.

One device exploded while a second was disarmed. No one was injured in the incidents.

The alarm was raised in the early hours of this morning by an anonymous phone call to the Samaritans in Newry.

The Army Bomb Disposal Team was first called to Castle Heights in Dundalk at around 2.30am when a 'viable improvised explosive device' was found under a car, which was parked outside a house in the estate.

The pipe bomb was dismantled and removed, and no controlled explosion was carried out.

That devise will today be examined by garda technical experts for clues as to who planted the bomb.

Within minutes of leaving that scene the team were called to Glengowan in the town to examine a similar device that had exploded at a house.

No one was injured in that incident and there was no damage caused as a result of the minor explosion.

Gardaí are investigating both attacks to see if they are linked.