India, Feb. 10 -- A day after three people were found dead inside a parked car on the Peeragarhi flyover in outer Delhi, police on Monday said they had questioned a "baba" as part of their probe into the case, possibly establishing a link between the two men and the woman, and had also found evidence that poison could be linked to their deaths.

On Sunday, the bodies of the two men - a 76-year-old in the driver's seat and a 47-year-old property dealer in the passenger's seat - and the 40-year-old woman, who was sitting in the back seat, were found inside a white Tigor around 3:50 pm after passing motorists informed police about the parked in the service lane of the flyover.

The car belonged to the 76-year-old, and the two men, investigat...