Police believe a petrol bomb attack on a house in the Waterside area of Londonderry was sectarian.
The attack took place in Londonderry
The device hit the step of the house on Lapwing Way in Clooney, but only caused minor damage.
The attack happened shortly before midnight. The occupants, who the police said were Catholic, were inside the house at the time.
It is the second petrol bomb attack on a house in the Waterside area within two days.
On Wednesday, a Protestant family escaped injury when a device hit the porch of their house in the Fountain estate causing scorch damage. No-one was hurt.
The latest attack was on the home of a couple who have two daughters, aged 20 and 17, and a 12-year-old son.
The mother, who asked not to be identified, said she was "petrified".
"What's going to come next? We got paint thrown at the back of the house in September," she said.
"One of my daughters has moved out, she was so afraid because she was pregnant. Since that, she has had her wee baby and for her own safety and the child's safety she moved out."
Councillor Joe Miller of the DUP described the attack as "sickening".
"This family are well known in the Waterside. They have been living there for quite a time beside their Protestant neighbours and they are well respected and well liked," he said.
"It has to be condemned, as the attack in the Fountain yesterday has to be condemned."
Sinn Fein councillor Raymond McCartney said he thought that people had "moved away from all that type of nonsense".
"It is worrying in the sense that in the year 2006 we have people who feel that the way to treat their neighbours is to throw petrol bombs at their front doors," he said.
The police said such attacks could have serious consequences.
Chief Inspector Milton Kerr said: "We absolutely condemn any type of attack from either side. It's totally unacceptable and will
eventually lead to a death."