The Mumbai Police on Tuesday said they have received four applications so far alleging extortion by Narcotics Control Bureau's (NCB) Mumbai zonal director Sameer Wankhede and other officials, and have launched an enquiry to verify these claims. One of the applications was sent by NCB independent witness Prabhakar Sail who had alleged that he had overheard K P Gosavi, another witness in the cruise ship raid case, talking to one Sam D'Souza over the phone about a demand of Rs 25 crore including Rs 8 crore for Sameer Wankhede. Sail has sent the application against NCB officers to the Mumbai Police. Wankhede also visited the agency's headquarters on Tuesday and spent over two hours. Earlier in the day, Maharashtra minister Nawab Malik on Tuesday accused Wankhede of illegal phone tapping and announced that he will hand over a letter on the official’s ‘misdeeds’ to the agency head.