Congress MP Shashi Tharoor reacts to reports of a polygraph test on three of the key witnesses. Tharoor said he would "cooperate 100 per cent with the probe and will say all after the probe is over."


Investigators probing Sunanda Pushkar death case have sought lie detector test of three key witnesses to verify certain evidence, Delhi Police chief B S Bassi today said, even as there is indication that around a dozen witnesses may be asked to undergo the examination.


The Delhi Police has approached a city court for permission to carry out polygraph test on Narain Singh, who is domestic help of Sunanda's husband and Congress MP Shashi Tharoor, driver Bajrangi and family friend Sanjay Dewan.


Asked whether investigators were planning to subject Tharoor to polygraph test, Bassi said he would not like to "speculate".


Sunanda was found dead in the hotel suite on January 17 last year, a day after she was involved in a spat with Pakistani journalist Mehr Tarar on Twitter over the latter's alleged affair with Tharoor. Bassi said investigators are waiting a report from Federal Bureau of Investigation to know about the kind of poison found in Sunanda's body.


Pic: Shashi and Sunanda Tharoor on their wedding day in August 2010.