Five crew members are missing after a tug overturned after a collision with a boxship off Indonesia.

The tug, named as Mitra Jaya XIX, capsized on 23 January 2021, five nautical miles (9 km) off Karangjamuang.

The other vessel involved was the 1,005-teu feeder vessel Tanto Bersinar (built 1999), which is operated by Tanto Intim Line of Indonesia.

Three other seafarers were rescued on 24 January but the operation was hampered by bad weather, the Surya newspaper reported.

The operation was still ongoing on 26 January.

Fears crew were trapped

Rescue workers said the missing men may have become trapped inside the hull of the tug.

National search and rescue agency Basarnas has towed the vessel to shallower water in Ketapang.

Reports said meetings between Basarnas and other government agencies were continuing to assess how to move the rescue forward in adverse weather conditions.

The boxship is classed by Biro Klasifikasi Indonesia and has insurance cover from the Shipowners' Club.

The vessel has no recorded port-state-control detentions going back to 2009.

Tanto owns a modern fleet of more than 50 containerships. The group also controls bulkers in a fleet of 84 vessels.

The company has been contacted for further information.