Masked gunmen forced their way into a house in Derry last night and threw a bomb, causing minor damage.
The blast happened at about 11pm on the Lecky Road in the Brandywell area.
Shrapnel went through the window of a bedroom but there were no injuries, police said.
Sinn Fein Foyle MLA Martina Anderson said she was amazed nobody was hurt in the attack and added it was unclear who or what was the target. She said there was a two-year-old baby in a cot in the next room.