Two pipe bomb-type devices have exploded outside a house in Co Antrim.
They detonated at around 2.20am on Tuesday while a third failed to explode, the Police Service of Northern Ireland said.
Residents were evacuated from nearby homes during the incident at Mill Street in Lisburn.
Army Technical Officers examined and made safe the unexploded third device.
Police said there were no injuries but the blasts damaged the front of a house and a car parked outside.
Evacuated residents have taken shelter in the city's Island Centre.
Chief Inspector David Nixon said: "Thankfully no one was injured, however the blasts caused damage to the front of the house and it appears as though a car parked outside the property was also tampered with and damaged."
A cordon remains in place around Mill Street and anyone with information is asked to contact police.
SDLP Lagan Valley MLA Pat Catney said: “Those behind this attack on people in Lisburn are coward and criminals. They sneak in under the cover of darkness and plant bombs with the sole intention of maiming and murdering people in this quiet and settled community. It’s a disgrace.
“This is an area that I walk through almost every day. It’s just incredible to think that people here could come under attack in this way.
“A number of residents remain evacuated this morning in the island centre. I’ve visited them and they’re clearly shaken by what has happened here. I want to put on record my thanks to the council staff who’ve been so helpful.
“I would appeal to anyone with information about this attack to come forward to the police. This is so out of the ordinary for this community, if anyone saw or heard anything suspicious, please come forward. It’s the only way we’ll bring these thugs, who were set on murder and mayhem, to justice."
Security alert continues in Mill Street, Lisburn after two pipe bomb type devices detonated outside a house during early hours of this morning. A third device was made safe by ATO. Some residents remain evacuated at this time.
— PSNI (@PoliceServiceNI) February 27, 2018
Mill St in Lambeg area of Lisburn closed and number of homes evacuated following discovery of suspicious object and reports of loud bangs in the area. No reports of any injuries at this time and people area asked to avoid area as examination of object is carried out.
— PSNI (@PoliceServiceNI) February 27, 2018
