Delhi police is now stepping up the probe and want to conduct polygraph test on three key witnesses
"Have been told that medical board's advice in late Sunanda's case has been received," Delhi police Commissioner BS Bassi said in a tweet.
The medical board, comprising doctors from Delhi, Chandigarh and Puducherry was formed to study the findings of FBI and AIIMS.
Investigators probing the mysterious death of Sunanda Pushkar may move a local court in Delhi seeking lie detector test on her husband and Congress MP Shashi Tharoor.
Six persons including three "prime witnesses" in the Sunanda Pushkar death case were put through lie detector test, Delhi Police Commissioner B S Bassi said on Monday amid indication that a number of other witnesses may be asked to undergo the examination.
The details of the FBI report that has virtually ruled out 'polonium poisoning' as the cause of Sunanda Pushkar's death cannot be made public before its submission in court, Delhi Delhi Police said on Thursday.
Tarar's questioning took place in February for over two hours.
A Delhi court on Wednesday allowed the Delhi Police to conduct lie-detector test on three "suspects" in the Sunanda Pushkar murder case.
Congress MP Shashi Tharoor may be questioned in a day or two in connection with the mysterious death of his wife Sunanda Pushkar, Delhi Police Commissioner B S Bassi said on Monday.
Shashi Tharoor on Friday appeared for the third time in two days before the SIT.
Delhi Police on Saturday said it is not going to question Congress MP Shashi Tharoor for now in connection with the mysterious death of his wife Sunanda Pushkar as it would first want to examine all other people related to the case and look into available evidence.
Congress leader Shashi Tharoor has once again been questioned in connection with his wife Sunanda Pushkar's death and the special investigation team probing the high-profile case may summon him again.
Sanjay Dewan, a family friend of Shashi Tharoor and his wife Sunanda Pushkar and a key witness in her mysterious death case, on Wednesday said they were a "happy couple" and he was not aware whether she was suffering from any ailment.
The case of the death of Sunanda Pushkar, wife of Congress leader Shashi Tharoor, reached a new stage with the FBI endorsing the AIIMS report of poisoning.
Shashi Tharoor was intensely questioned on Monday night over two hours by a special team of the Delhi police on the circumstances leading to the mysterious death of his wife Sunanda Pushkar a year back and her spat with Pakistani journalist Mehr Tarar over her links with the Congress member of Parliament.
Politician Amar Singh was on Wednesday questioned for nearly two hours by a special team of Delhi Police probing the Sunanda Pushkar case after he had recently claimed that she had spoken to him about the Indian Premier League controversy a couple of days before her death.