National Investigation Agency (NIA) conducted raids on Saturday at ten premises of controversial preacher Zakir Naik's Islamic Research Foundation (IRF) in Mumbai.
A case had been registered by NIA against Zakir Naik and others on Friday under 10, 13, 18 of UAPA and section 153A of IPC.
Naik has been accused of spreading enmity amongst various religions and his speeches telecast on Peace TV have come under government surveillance.
The search operations are still under way at IRF premises and NIA is being assisted by Mumbai Police in its search operations.
The Union cabinet had approved a proposal to outlaw the IRF on November 15 for its alleged terror activities.
Naik's NGO, IRF came under suspicion after one of the terrorists in Dhaka attack had allegedly posted on social media that they were heavily inspired by Naik's speeches.
Further, some young men from Malavani in western suburbs who had left their home to join Islamic State earlier this year were also allegedly inspired by the Isalmic preacher's speeches.
Some members of IRF were arrested for allegedly motivating and radicalising youths from Kasargod in Kerala to join ISIS. The case is being investigated by the National Investigation Agency (NIA).
Zakir Naik is currently out of the country apparently to evade arrest, sources said.