He noted that after the "terrible attack" of the August 1998 bombings in Omagh, Northern Ireland, carried out by a splinter group of the Irish Republican Army, peace had eventually been reached.
"That could have happened [in Spain] if Batasuna had shown a clear attitude of rejecting violence," he said.
Earlier, the Interior Ministry said the owner of the van blown up in the blast was abducted by an ETA commando after driving across the French border.
RSS