The remains of three missing crew members have been found on board Maersk Honam, which was hit by a major fire on March 6.
Maersk Line said the three mariners remain unidentified, with grave fears held for the fourth missing crew member.
"Given the time passed and the severe fire damages of the vessel we must conclude by now that we have lost all four colleagues who have been missing since the fire onboard Maersk Honam," said Chief Operating Officer, Søren Toft.
"All four families of our deceased colleagues have been informed.
"Our most heartfelt condolences go out to families of our deceased colleagues. We share their sorrow and (will) do our outmost to support them in this devastating time."
The missing seafarers included two Filipinos, one South African and one Indian.
The fire claimed five lives of the 27 crew members manning the ship.
The Indian Coast Guard said the fire on board the ultra-large containership was prevented from spreading.
Fire-fighting vessels remain engaged, and salvage operations are being led by Smit Salvage and Ardent.
On land, the medical conditions of the 22 evacuated crew are progressing positively, with the majority having been released from hospitals.
A full investigation will be conducted to determine the cause of the fire and the damage to the vessel and cargo.
