NEW DELHI (Reuters) - India's aircraft accident investigation body said on Thursday it was too early to reach any "definite conclusions" on what led to the deadly Air India Boeing plane crash last month that killed 260 people.

Sumeet Sabharwal, 56, was the captain on the flight, while Clive Kunder, 32, was the co-pilot who was flying the plane. Together, the two pilots had more than 19,000 hours of flight experience - nearly half of it on the Boeing 787. Both had passed all pre-flight health checks before the crash.

Investigators, led by India’s Aircraft Accident Investigation Bureau with the assistance of the NTSB, have been piecing together evidence to determine what caused Air India Flight 171 to crash on June 12,