The Maharashtra government on Thursday ordered a probe into Islamic preacher Zakir Naik's speeches that allegedly inspired some of the Dhaka attackers while the Centre said "appropriate action" would be taken against him.

With Naik coming under the scanner, Congress leader Digivjaya Singh too came into the BJP's line of fire after a 2012 video, showing him share a dais with the televangelist at an event to promote communal harmony, appeared on Thursday.

The video triggered war of words between the BJP and the Congress.

Meanwhile security was beefed up outside Naik's 'Islamic Research Foundation' office at Dongri in south Mumbai as a precautionary measure.

Naik has released a statement, saying he "totally disagreed" that he inspired the terror act in Dhaka.

"There is not a single talk of mine where I encouraged one to kill another, whether Muslim or non-Muslim."

"I have asked the Mumbai Police Commissioner to conduct a probe [into Naik's speeches] and submit a report," Chief Minister Devendra Fadnavis said.

Everything, including Mr. Naik's speeches, his social media accounts, sources of funding (of a foundation run by him in Mumbai) will be scrutinised, CM said.

"The Home Ministry will study [his speeches]. It will take appropriate action after studying them," Information and Broadcasting Minister M. Venkaiah Naidu told reporters in Delhi.