Video: Bali Lion Air Crash
The Lion Air craft is believed to have slid off the runway and into water outside Ngurah Rai Airport, near Denpasar late this afternoon.
A large crack was clearly visible on the plane as it sat swamped by water about 6pm (AEST).
It was not immediately known if the broken fuselage was caused mid-air or on impact.
The plane was travelling from Bandung in West Java to Denpasar when it experienced trouble, AAP reported.