A bomb that police said had the capacity to kill was defused in the garden of a Co Tyrone house yesterday.
The device was made safe by the army following an overnight security operation at the property on the Strahulter Road near Newtownstewart.
Condemning those responsible for the device, police said it had the potential to kill, cause serious injury or damage property.
The area had been sealed off after an anonymous telephone warning.
Dissident republicans were believed to be responsible for what was one of three attacks launched yesterday.
In Strabane, Co Tyrone, the security forces were examining a "viable device" found at a pub car park at Cloughcor. Meanwhile, a security operation was continuing around the police station in Craigavon, Co Armagh, after bomb remains and a mortar tube were discovered.
Police believe a mortar fired at the police station in the Brownlow area of the town missed its target and landed at the rear of the local health centre across the road.
It was the first such attack in some time and an escalation of the dissident campaign which has caused more than £30 million (€44 million) in damage in a series of fire bomb attacks on commercial premises in Belfast and Newry, Co Down, in the past year.