Indonesian authorities are to download the contents of a cockpit voice recorder (CVR) from a Lion Air jet that crashed more than two months ago, killing all 189 people on board, after it is retrieved from the sea near Jakarta.

The Lion Air Boeing 737 MAX jet that crashed in Indonesia flew erratically during a flight the previous evening when it experienced a "technical problem", according to data from flight tracking website FlightRadar24.

All 189 passengers and crew aboard a crashed Indonesian Lion Air jet were likely killed in the accident, rescue officials said yesterday, as they announced they had found human remains and would continue the grim search through the night.

An Indonesian aircraft with 189 people on board crashed into the sea and sank soon after taking off from the capital, Jakarta, on a domestic flight to a tin-mining region, officials say.