The PSNI has said a bomb found during an alert in north Belfast was a blatant attempt to kill police.
The viable device was discovered at a house in Alliance Avenue yesterday after police went to investigate reports that shots had been fired.
Chief Inspector Andy Freeburn said: "Those who carried out this heinous act showed callous disregard for the safety of the local community and police officers serving this community."
The alert was raised after reports of shots being fired in the area.
A number of holes were discovered in windows of the property in Alliance Avenue.
Around 30 families had to be evacuated as army technical officers examined the suspicious object and carried out a controlled explosion.
Chief Inspector Freeburn said police officers would not be deterred from carrying out their duty despite the risks posed by elements intent on causing them harm.