Ardoyne bomb was 'mortar type' device
A bomb found in the Ardoyne area of north Belfast is believed to have been a mortar type device that could have been used to target a police vehicle.
The police have said it put the lives of people in the area at risk.
They have appealed for help to catch those responsible.
More than 30 families were moved out of their homes for several hours on Thursday after police discovered the device at the back of a house in Jamaica Street.
BBC Newsline's home affairs correspondent Vincent Kearney reports.