The Enforcement Directorate (ED) on Tuesday 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 (IO) of the case at the agency's office here during which her statement was recorded under the provisions of the Prevention of Money Laundering Act (PMLA). They said the agency wanted to grill Noorani about the alleged fund transactions in her account and the firms associated with her.