A rescue diver who died in the salvage operation for a passenger jet crashed off Indonesia, killing all 189 people on board, has been hailed as "a humanitarian hero".
The 48-year-old was killed in the sea on Monday, 13 minutes after it took off from Jakarta.
Syachrul Anto had also been one of the most involved in the search for Air Asia jet that crashed off Borneo in late 2014.
It is not clear how he died.
Muhammad Syaugi, head of Indonesia's search and rescue agency, said: "Deepest condolences for the passing of a humanitarian hero from the Indonesian diving rescue team."
The fatality came to the end of the Boeing 737 MAX 8.
So far 73 bodies have been recovered, but only four have been identified.
The search, taking place in around 100ft of water, has been hampered by strong currents and nearby pipelines.
Divers have been scouring the seabed for the cockpit voice recorder after a "low ping signal" which was detected by a sonar locator.
Investigators are still trying to retrieve information from the recovered on Thursday, that could help determine the cause of the disaster.
JT-610 JT-610 had been asked for permission to return to Jakarta.
The plane is so reported to have experienced difficulties during a previous flight on Sunday from Bali to Jakarta.
Lion Air has claimed a technical problem was fixed after Sunday's flight.
The Lion Air crash is Indonesia's worst airline disaster since 1997, when 234 people died on a Garuda flight near Medan.
In December 2014, on Air Asia flight from Surabaya to Singapore plunged into the sea, killing all 162 on board.
Indonesian airlines were barred in 2007 from Flying to Europe because of safety concerns, although they were allowed to resume services in the following decade.
The ban was completely lifted in June. The US lifted a decade-long ban in 2016.
Lion Air is one of Indonesia's newest and fastest growing airlines.