The basic issue of who placed the explosives-laden vehicle and on whose instructions it was done needs to be found out, the Maharashtra Navnirman Sena (MNS) chief said.
Sachin Waze was earlier arrested by the NIA in connection with the explosives-laden car found outside industrialist Mukesh Ambani's residence in Mumbai.
The NIA arrested Sachin Waze for his alleged involvement in placing the explosives-laden vehicle on Carmichael Road near billionaire Mukesh Ambani's residence Antilia.
The officer said further investigation and forensic analysis will be done after the mobile handset and details of the seizure are received from Tihar Jail authorities.
Opposition leaders in the state Assembly have been demanding an NIA probe in the case after the death of a 'prime witness' Mansukh Hiren was discovered
This marks the second billion-dollar investment by Silver Lake in a Reliance Industries subsidiary after the USD 1.35 billion investment in Jio Platforms announced earlier this year.