A police officer has been injured after being struck by a piece of masonry following an Orange Order parade in Belfast.

Police have been pelted with bricks, bolts and bottles after preventing loyalists from marching from the unionist Woodvale area toward the nationalist Ardoyne area of the city.

A water cannon has been deployed and there are reports of other officers also being injured.

The violence comes after a day of largely peaceful Twelfth of July holiday loyal order parades across Northern Ireland.

It flared after riot squad officers from the Police Service of Northern Ireland (PSNI) blocked access to the contested stretch of the Crumlin Road.

Items were thrown at them within minutes of the parade reaching police lines.

A number of loyalists broke through police lines and danced on the bonnets of PSNI armoured land rovers at one point.

Loyalist bandsmen played the sectarian Famine Song and the well-known loyalist tune The Sash.

Women and children were among the bandsmen and Orange Order members in the crowd barracking police lines.

A large security operation has been mounted at the Woodvale/Ardoyne sectarian interface, where dissident republicans have attacked police in the past.

The Government-appointed Parades Commission, which rules on contentious marches, had issued a determination barring Orangemen from part of the Crumlin Road.

There was no rioting last year, but in 2013 - when restrictions were imposed on the Orange Order parade for the first time - mass violence broke out in the unionist Woodvale area.

Citybeat's Damien Edgar reports from Belfast:

PSNI has said that a 16-year-old was injured in a serious incident involving pedestrians and a male driver in the Ardoyne area of the city.

The driver of the vehicle has been arrested.

Assistant Chief Constable Stephen Martin is appealing for calm, and he has asked that space be given to the medics attending the scene.

Meanwhile, the PSNI also says that a female police officer has been attacked by two people in Belfast city centre.

A man punched the officer in the face and knocked her to the ground. She was then punched again by a woman.

The man and the woman, both aged 22, were arrested after continuing to be violent towards other police officers.

A male PSNI officer received a hand injury during the incident, while trying to assist his colleague.

Chief Inspector Robert Murdie said," I utterly condemn this unprovoked attack on officers who were out doing their duty in keeping people safe."