Hopes of rescuing 53 sailors fade as missing submarine now believed to be 'sunk' after debris discovered, Indonesia Navy chief says

• Items have been discovered from the missing Indonesian submarine, incuding prayer rugs.
• The submarine is now presumed to be 'sunk', Indonesia's Navy Chief of Staff said.
• Hopes of rescuing the 53 crew members who were on board have now faded.

Items have been discovered from the missing Indonesian submarine, Indonesia's Navy Chief of Staff Admiral Yudo Margono said on Saturday.

Rescuers found a grease bottle, parts of a torpedo, and prayer rugs from the submarine, the Associated Press reported.

"With the authentic evidence we found believed to be from the submarine, we have now moved from the 'sub miss' phase to 'sub sunk,'" Margon said during a press conference.

Hopes have now faded of rescuing the 53 crew members who were onboard the submarine.

The submarine, the KRI Nanggala-402, disappeared without a trace on Wednesday off the island of Bali.

It went missing during a torpedo drill, a navy spokesperson said.

Countries from around the world chipped in to help find the missing naval submarine, Insider's Madison Hall wrote.

Time was running out to save the crew members as the vessel only had enough oxygen to last until Saturday, Insider's Cheryl Teh reported on Thursday.