A "black box" flight data recorder from Lion Air flight JT 610 has been found by divers off the coast of Indonesia.
The plane, carrying 189 people, crashed soon after taking off from Jakarta, the Indonesian capital, on Monday.
It plummeted into the Java Sea - no survivors have been found, nor has the body of the Boeing 737.
There is as yet no indication of what caused the crash, but the aircraft is believed to have experienced technical problems on its penultimate flight.
The plane was making a one-hour journey to the western city of Pangkal Pinang when it went down.
The pilot had asked air traffic control for permission to turn back to the airport, but then contact was lost.
A diver told reporters on board one of the search and rescue vessels scouring the Java Sea: "We dug and we got the black box."
The diver, identified as Hendra, said the box had been buried in debris on the sea floor, Reuters reports.
Officials say it was a data recorder, and that they are still searching for second "black box" which would have recorded conversations between the two pilots.
Local news channel Metro TV showed footage of the box, inside a plastic crate, being brought onto a ship.
BBC Online
BDST: 1458 HRS, NOV 1, 2018
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