The Enforcement Directorate, ED today questioned controversial Islamic preacher Zakir Naik's sister in connection with a money laundering probe against him and others. Officials said, Naik's sister Nailah Noorani met the Investigating Officer of the case at the agency's office in Mumbai during which her statement was recorded under the provisions of the Prevention of Money Laundering Act (PMLA). <br/><br/>The central probe agency had registered a criminal case against Naik and others last December after taking cognisance of an NIA complaint filed under the Unlawful Activities (Prevention) Act. The ED is looking into the charges of alleged laundering of illegal funds by the accused in the case and the subsequent proceeds of crime thus generated. It has also summoned Naik but he is still to depose before the agency as he is reported to be abroad. It has recently arrested Naik's close aide Aamir Gazdar in this case. The National Investigation Agency had earlier registered a case against Naik under anti-terror laws for allegedly promoting enmity between different religious groups. <br/>