"We are focussing on the reason for the sudden, unnatural death. All injuries have been photographed and filmed. The nature of injuries can't be revealed but there were certain injuries," Dr Sudhit Gupta, one of the three doctors of the All-India Institute of Medical Sciences, New Delhi, who conducted the autopsy, told the press. The full report is expected on Monday. The biological samples taken to investigate if she died of poisoning was being analysed, he said.

The body of Sunanda Pushkar Tharoor was cremated at the Lodhi Road crematorium in New Delhi after the autopsy. Earlier, in the morning on Saturday, her husband, Shashi Tharoor (57), Union deputy minister for human resources development, was admitted to the AIIMS ICU upon a complaint of chest pain and discharged in the afternoon. Doctors said he was stable and his ECG was normal study. Hypertension was the cause of the complaint, they said.

Police have scanned the CCTV of the hotel and have questioned the staff. A Congress MP from Thiruvananthapuram, Tharoor's statement was also taken by the police on Friday night.

Sunanda Tharoor was found dead in the five-star hotel in New Delhi on Friday evening, a day after unconfirmed reports in the press about an alleged affair Tharoor had with a Pakistani journalist, Mehr Trar, whom Sunanda's Twitter called a 'stalker' and an 'ISI agent'. Tharoor had said the social network site accounts were hacked and they issued a statement saying that they were happily married.

They had checked into the Leela Palace hotel in Chanakyapuri as their official residence in Delhi was under repair, after arriving from Thiruvananthapuram in Kerala where she had been admitted in a hospital for investigation and treatment of undisclosed ailments. Doctors at the KIMS hospital in Kerala said Sunanda Tharoor did not have any serious illness. EM Najeeb, director of the hospital where she was admitted on January 12, said Tharoor was with her. She was discharged on the 14th, he told newsmen.

The minister's private secretary Abhinav Kumar said that the two had taken the suite in the hotel on Thursday and had spent the night there.

She was found dead by Tharoor on return to the hotel at 8:30 pm from the AICC session which he was attending the whole day. As there was no response from the room, Tharoor had called the hotel staff and opened the door to find his wife dead on the bed. The hotel's doctor confirmed the death and the police were informed soon after by Tharoor's private secretary.

The police sources said an overdose of drugs could have led to her death. Rigor mortis had already set in when the body was found. This indicated that she had died at least 4 hours earlier. The autopsy was done by an expert team of three doctors at the All-India Institute of Medical Sciences, New Delhi, in the afternoon on Saturday. The full report will come on Monday.

Sunanda Tharoor, 52, daughter of an army officer and hailing from Kashmir, could always be seen at parties and events in Delhi with Tharoor. For both it was their third marriage. She had friendship with all in the higher circles. She was embroiled in a controversy when IPL chief Lalit Modi raised questions about her ownership of the Kochi IPL. And Tharoor had reportedly intervened. It was alleged that Tharoor made Rs 70 cr in the IPL deal. Gujarat Chief Minister Narendra Modi had notoriously remarked about Tharoor's wife's "value" for Tharoor in this connection.

(Earlier report: Union Minister Shashi Tharoor's wife Sunanda Pushkar found dead in Delhi hotel)