A top officer of the anti-drugs agency Narcotics Control Bureau, who is investigating the case in which megastar Shah Rukh Khan's son was arrested, has alleged that he is being spied on, sources said. Samir Wankhede -- who spearheaded the raid on the cruise ship off Mumbai coast earlier this month, leading to the arrest of Aryan Khan -- has alleged that other officers of the team are also being tracked.