"Two fighter aircraft of IAF were involved in an accident near Gwalior today morning," the Indian Air Force tweeted.

"The aircraft were on routine operational flying training mission," tweeted the force.

"One of the three pilots involved, sustained fatal injuries," read the tweet.

The Sukhoi had two pilots, while the Mirage had one pilot, defence sources told NDTV.

The IAF said it has launched an inquiry to ascertain the cause of the mishap.