 Kosovo terrorism was exported across the borders, with former KLA members quickly established bases in the demilitarized zone, and Serbian police had to stop patrolling the area to avoid being ambushed.Ethnic Albanian politicians opposed to the KLA were attacked, including Zemail Mustafi (the vice-president of the Bujanovac branch of Slobodan Milošević's Socialist Party of Serbia) who was assassinated.Between 21 June 1999 and 12 November 2000, 294 attacks were recorded, most of them (246) in Bujanovac, 44 in Medveđa and six in Preševo.