Since a long time, the Congress party has been targeting the central government and alleging that the Bharatiya Janata Party-led Centre paid a higher cost per jet than the deal they had agreed to.
On August 18, Congress president Rahul Gandhi had constituted a six-member task force to look into the alleged scam.
The Rafale jets were chosen in 2012. India initially planned to buy 18 off-the-shelf jets from France, with 108 others to be assembled in the country by the state-run plane-maker Hindustan Aeronautics Ltd (HAL).
The BJP government scrapped the UPA's plan in 2015 and announced that it would buy 36 "ready-to-fly" Rafale jets instead of seeking a technology transfer from France's Dassault Aviation and making the aircraft in India.