BELFAST, Northern Ireland (AP) _ Terrorists fired mortars at an army and police base near the border with the Irish Republic on Thursday, injuring three civilians, police said.

The British Broadcasting Corp. and Press Association, the British domestic news agency, said they had received a claim of responsibility from the Irish Republican Army.

The attack occured in Crossmaglen, a village near the border.

A spokeswoman for the Royal Ulster Constabulary, the province's police force, said the three people were injured by mortars that fell short of their target. None of the injuries was serious, she said.

Sgt. Rosemary Gifford said one of the injured was a 7-year-old child treated for cuts and bruises.

At the same time as the mortar attack, shots were fired at the observation post guarding the base but no one was hit, she said.

The predominantly Roman Catholic IRA is fighting to drive the British out of Northern Ireland and unite the Protestant-dominated province with the overwhelmingly Roman Catholic republic to the south.