British officials are considering the renewal of a controversial policy of jailing suspects without trial to stem a spate of bloody terrorist attacks.

As the officials discussed the policy Friday, a bomb, believed to be planted by the outlawed Irish Republican Army, exploded at a British army base in Duesseldorf, West Germany, wounding three British soldiers and a German civilian.The 12:15 p.m. explosion at Roy Barracks, the base of an engineers unit, blew off the roofs of two buildings at the base and broke doors and window frames, German authorities said.

If definitely linked to the IRA, the explosion would be the group's fourth attack on a British military target in the past three weeks.

Three weeks ago, the IRA claimed responsibility for two explosions at a British army base in Duisburg, West Germany, that wounded nine soldiers.

On Monday an explosion at a British army base in London killed one soldier and injured nine others. The IRA claimed responsibility for that.

A government spokesman said Tom King, Britain's top official for Northern Ireland, had decided to cancel his vacation to discuss the terrorist threat with army, police and intelligence chiefs.

Officials declined to comment about additional security measures they may have decided to impose.

Intelligence sources said they feared an even more intensified IRA "terror" campaign on Aug. 9, the 17th anniversary of the defunct internment policy under which thousands of IRA suspects were jailed without trial. Britain was forced to abandon the policy in 1975 after massive international protests.