A bodybuilding contest in Belgium had to be cancelled after a surprise visit by anti-doping officials caused the competitors to flee.Anti-doping official Hans Cooman said some bodybuilders blatantly grabbed their belongings and ran away when he walked into the room."I have never seen anything like it and hope never to see anything like it again," he said."The sport has a history of doping and this incident didn't do its reputation any good."Belgium's bodybuilding federation said it could not explain why the competitors had suddenly rushed off.Mr Cooman said he would report the case to the Flemish disciplinary committee.