The arrest of Krajisnik by French troops came after Clark’s office intimated that the Americans might move against him if the French, who control that sector of Bosnia, did not. Paris had also grown tired of international criticism that it was letting killers run free. Karadzic is said to be on the run within the Bosnian Serb republic. NATO officials fear his arrest won’t be easy. Says one NATO source, “It’s likely that people are going to have to get killed to get Karadzic, and he’ll probably be killed, too.”