New Delhi: In a new twist in the Sunanda Pushkar death mystery, the Federal Bureau of Investigation (FBI) has concluded that she did not die from radioactive poisoning.
51-year-old Pushkar, wife of Congress MP Shashi Tharoor was found dead at the Leela Hotel in Delhi in January 2014.
Initially her death was considered as suicide but earlier this year the Delhi Police claimed that Pushkar died of poisoning.
Her viscera samples were sent to the FBI lab in Washington in February this year after a panel of doctors from AIIMS Delhi concluded that the poison could not be detected in Indian labs.
The FBI report said Pushkar did not die due to poisoning by polonium or any other radioactive substance.
Although no one has been named a suspect in the case yet, the Delhi Police had conducted polygraph tests on six people, including Tharoor's domestic help Narain Singh, driver Bajrangi and family friend Sanjay Dewan, all listed as prime witnesses.
Shashi Tharoor has also been questioned by the police a number of times.