Hundreds of extra police have been sent from Britain to Northern Ireland after a second night of rioting by UK loyalists in Belfast. They are angry at a restriction to their annual Orange Day parades amid heightened sectarian tension. One officer was briefly engulfed in flames after being hit by a petrol bomb, but colleagues quickly put out the fire and he was not badly hurt. The violence was said to be less serious than on Friday night when a unionist politician was knocked unconscious and more than 30 police officers were injured. Police again came under attack from young loyalists who threw stones, bottles and fireworks. The violence came even though the Protestant Orange Order suspended its protests against a decision banning it from marching along a stretch of road dividing rival communities in north Belfast. On Saturday the head of Northern Ireland