"As the NIA has registered an offence against Naik and its investigation into the case is in progress, we have handed over the probe to them," a senior officer of the Economic Offences Wing (EOW) of Mumbai Police, said.
"We will provide whatever logistic support (to NIA) that is required," he said.
In August this year, the EOW of Mumbai Police had initiated a Preliminary Enquiry (PE) into IRF's foreign funding.
The Centre recently banned the IRF and declared it as a terrorist organisation under the Unlawful Activities Prevention Act (UAPA) for five years.
Also Read
Earlier, Mumbai Police had submitted its report related to Naik and IRF's activities to the state government.
During the EOW investigation, it was revealed that around Rs 50 crore were allegedly deposited from abroad into various accounts of Naik, his wife and other relatives.
The NIA had registered an offence against Naik on November 18 for promoting enmity and hatred between different religious groups in India through his public speeches and lectures on various platforms.
Naik has been booked along with unnamed IRF officials under section 153-A of IPC (promoting enmity between different groups on grounds of religion and doing acts prejudicial to maintenance of harmony) beside various sections of UAPA.
The NIA had recently asked three banks to freeze 25 accounts of Naik, his family members and IRF. In addition, the NIA also handed over a list of over 12 people including Naik, his family members, close friends and organisations, to all 72 scheduled commercial banks to check whether these people had any account in these financial institutions.
Disclaimer: No Business Standard Journalist was involved in creation of this content