Government has revoked the passport of controversial Islamic preacher Zakir Naik. Sources said, the passport has been<br/>revoked by the Regional Passport Office, Mumbai on the request of National Investigation Agency. <br/><br/>The NIA is probing the alleged terror activities and spreading communal hatred by Naik and his organizations including Islamic Research Foundation. <br/><br/>The Agency had questioned his family members in this connection. It is believed that now the NIA will explore the legal possibility of his deportation or extradition.