Security forces were tonight investigating an explosion at a house in flashpoint North Belfast.
A device was believed to have been thrown through the window of a Catholic home in Manor Street.
No one was injured in the attack but a woman in the house needed treatment for shock, said a police spokeswoman.
Army bomb disposal experts were sent to the scene to examine the remains of a device which loyalists were being accused of throwing.
Meanwhile in Co Down, army bomb experts carried out a controlled explosion on a suspected bomb left at the home of a serving police officer.
The same officer’s home at Annalong was targeted in April last year when a pipe bomb found in the garden was defused.