Two aircraft that were part of the Indian Air Force’s (IAF) acrobatic demonstration team, Surya Kiran, collided in mid-air on Tuesday while practicing for an upcoming air show. The jets, Hawk 132 trainers made by BAE, were attempting a “mirror” maneuver when the accident occurred. According to Flight Global, at least two pilots were able to eject, but another was pronounced dead. The surviving pilots sustained significant injuries, and according to the IAF, one pilot suffered two broken legs and was taken into surgery.

“Today at around 11:50 a.m., two Hawk aircraft of Surya Kiran aerobatic team of IAF crashed while practicing for the Aero India Air Show,” the IAF said in a statement, according to the Times of India. “Three pilots occupants. Two pilots ejected and have been evacuated to the Command Hospital. The third pilot sustained fatal injuries. Damage to life and property in the vicinity of the crash site is being ascertained.”

Surya Kiran is the IAF’s version of the U.S. Air Force’s Thunderbirds and typically flies in a formation of nine. Although the Hawk has two seats, under normal conditions, only one pilot is on-board. The remaining seven Surya Kiran aircraft are grounded, and the IAF stated that an investigation into the cause of the crash is being launched.

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