Dutt was recently found dead with his live-in partner in her Gurgaon flat under mysterious circumstances. Police say there is no connection between the case and his murder.
Akhtar — behind the music of hits such as Aashiqui, Raja Hindustani and Saajan — is accused of ordering a hit on media baron Gulshan Kumar through underworld don Abu Salem more than two decades ago. He currently lives in London. Kumar, a well-known Bollywood director and owner of the T-Series brand, was gunned down outside a Mumbai temple on August 12, 1997. Nadeem was acquitted by a city court in 2003 for lack of evidence.
On the phone, Dubai reportedly revealed Ibrahim's animosity towards Akhtar, whom he held responsible for the arrest of Salem, his trusted lieutenant.
That call, in turn, was part of a larger special cell investigation into the activities of the Mumbai underworld, including connections, if any, to terror funding.
"Since it was a matter for the police force of a different city, we alerted the Intelligence Bureau and left it to their discretion. But with our interest aroused… we kept listening," the officer said.