NIA found a link between IRF and Abu Anas.
Sleuths found that Naik's speeches called for jihad.
His NGO was under probe following Dhaka terror attack.
He has been alleged of inspiring attackers.
Congress says it has returned amount. IRF says it hasn't got any.
Naik’s name cropped up following the Dhaka attack.
Naik claims Arnab has also hurt his religious sentiments.