A bomb has exploded outside an army barracks in Northern Ireland.
Police say a hijacked taxi carrying an explosive device blew up behind the Palace Barracks in Holywood, County Down.
The driver is reported to have been forced to take the car to the area after his family was held hostage.
Officers were evacuating the scene when the bomb went off. There are unconfirmed reports of some injuries.
The blast comes less than half an hour after law and order powers were officially transferred from London to Belfast.
It follows a number of recent attacks in the province including a car bomb which damaged a court building in Newry.
Dissident Republicans are widely suspected of being behind the blasts.