An autopsy report on Saturday said Indian minister Shashi Tharoor's wife, who was found dead in a luxury hotel after accusing her husband of being unfaithful, suffered an "unnatural, sudden death". "More tests" are needed to determine the final cause of Sunanda Pushkar's death and the results will not be known for two to three days, Sudhir Gupta, one of three doctors who carried out the autopsy, told reporters.