After signing the treaty, Shastri mysteriously passed away in Tashkent. It was said that he passed away due to a heart attack
Kuldip Nayar, in his column for Outlook India magazine, wrote, "When I returned from Tashkent, Lalita Shastri asked me why Shastri’s body had turned blue.
In his column , Kuldip Nayar revealed that Shastri's family members were convinced there was a foul play in his death.
Despite the death was in a suspicious condition, the post-mortem of his body was not done. There is no record of his death available in the Parliamentary Library
US intelligence agency CIA agent Robert Crowley had claimed in an interview that the CIA was behind Shastri's death.
Servant Ramnath and private doctor Dr RN Chugh who accompanied Shastri to Tashkent died before they could appear before the parliamentary body.