The agency has registered the case under the Narcotic Drugs and Psychotropic Substances Act, based on evidence shared by the ED about the suspected role of some persons dealing in banned or controlled drugs.
In August, Zoya Akhtar, Guneet Monga, Pooja Gupta, Taranjeet Kaur, Urmi Juvekar, Bina Paul and Miriam Joseph had signed a letter to the National Commission of Women, stating that they supported the fair investigation into Rajput's death, but not the online abuse and media trial faced by Chakraborty. Rhea has said in an earlier statement that she has never used drugs.
NCB source has alleged that Parihar had connections with Sushant's house manager Samuel Miranda.
The agency last week had arrested two men for alleged drug trafficking in the western metropolis and it is understood that the leads against the detained man came after questioning them.
Those arrested have been identified as Zaid Vilatra and Abdul Basit Parihar. Upon further investigation, NCB uncovered links with Lakhani and Vilatra.
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A search of Vilatra's premises yielded Rs 9,55,750 and foreign currency (US $ 2,081, 180 British Pound, 15 Dirham), an NCB official said.
"Zaid disclosed that he runs an eatery in Bandra which was not giving any pecuniary gains since lockdown", the NCB said, according to PTI. "Based on Vilatra interrogation, Parihar was made to join the investigation". Apart from the NCB, CBI and ED too are investigating Rhea on various charges.
Varun Mathur, Sushant Singh Rajput's business partner has been summoned by the Enforcement Directorate today. Meanwhile, the CBI on Wednesday questioned Rhea's father Indrajeet and mother Sandhya at the DRDO guesthouse.
Sharing a video of her father getting mobbed by reporters, Rhea wrote on Instagram: "This is inside my building compound, The man in this video is my father Indrajit Chakraborty (retd. army officer)".
The Indian Express is now on Telegram.