The PSNI says they believe another attack by dissident republicans is highly likely.
One of the most senior Police officers in the North says the threat level is severe.
Assistant Chief Constable Stephen Martin was speaking after a Prison Officer was seriously injured in a car bomb attack in Belfast this morning.
He believes dissidents may try to hijack the 1916 centenary celebrations;The officer suffered leg wounds and is now in a stable condition in hospital after undergoing surgery.
This local man gave first aid:
