Police in Northern Ireland have released dramatic footage showing the moment a car bomb exploded outside a Londonderry Courthouse.

The footage shows a group of young people walking past the vehicle just minutes before it exploded in a flash of light, as debris flew from the burning wreckage.

The New IRA is suspected to be behind the attack on Saturday evening.

The bomb was planted in a stolen pizza delivery car before it was driven outside the court house on Bishop Street in Derry.

The four clips that the Police Service of Northern Ireland released via Twitter show a Ford Fusion car, which was hijacked from a pizza delivery driver earlier that evening, before a figure ran away from the vehicle after parking it.

Earlier fears of a secondary device have been ruled out by the Police.