Police and soldiers were attacked with gasoline bombs as they tried to disperse protesters after a Orange Order parade through the flashpoint area of Ardoyne.
Bttles and bricks were thrown from rooftops along the Ardoyne road and the Ardoyne family center. Rioters also hijacked and burned a car, while police responded with dogs and water cannons.
Earlier Sinn Fein leader Gerry Adams urged the nationalist crowd to remain "calm, dignified and disciplined" as the contentious Orange Order parade passed through as part of the organization's July 12 celebrations.
Though insults were exchanged between loyalists and nationalists through a armored barrier, the parade passed largely peacefully. However security was high, with at least 50 tanks or armored vehicles lining the road and some 300 armed police and soldiers.
Adams told United Press International the police should have "moved out smartly" after the parade and allowed the stewards from the community to manage the situation.
The number and condition of those injured is not known, though onlookers said at least one journalist and one cameraman were among those taken to hospital.