According to Times Now, Pushkar's body was found at a room in Leela Hotel.
The shocking news comes just a day after Sunanda and her husband Shashi Tharoor were involved in a tweeter controversy, also involving a Pakistani woman journalist.
As the indecorous row surrounding the suave 57-year-old Tharoor escalated, the controversy-prone minister took to Twitter to come out with a joint statement with his wife Sunanda Pushkar to say they were "happily married", but distressed by "some unauthorised tweets".
"We wish to stress that we are happily married and intend to remain that way. Sunanda has been ill and hospitalised this week and is seeking rest. We would be grateful if the media respects our privacy," said the statement by Tharoor, who married Pushkar in 2010. The row erupted after exchange of some messages involving the three, some of them intimate.