The NIA carried out searches at the premises of controversial Islamic preacher Zakir Naik, his NGO and a few associates for the third consecutive day on Monday, even as it blocked the website of outlawed Islamic Research Foundation founded by him.
The anti-terror investigation agency is also set to summon Naik, who is abroad ever since his name cropped up after the Dhaka terror attack on July 1 when one of the terrorists involved posted on social media that they had been inspired by the former's speeches.
Search operations were carried out by the National Investigation Agency at the offices of IRF, premises of Naik as well as that of Harmony Media Pvt Ltd, from where the programmes were being aired on Naik's Peace TV.
The NIA also blocked the website of IRF, which was allegedly promoting "hate speeches" of Naik. "As part of investigation, all actions that need to be taken against a proscribed organisation, including banning of its online activities, are being undertaken," an NIA spokesperson said.
Last week, the central government banned the IRF and declared it as a terrorist organisation under the Unlawful Activities Prevention Act for five years.
If the Islamic preacher fails to respond to the NIA summon, a red corner notice will be issued against Naik through Interpol by it. The NIA is still trying to block Naik's Facebook page, Twitter account and YouTube videos that contain alleged "objectionable" material and may seek help from authorities in the US where the servers of Internet giants like Google and Yahoo are located, officials.