KRI Nanggala was participating in a torpedo drill, said Military chief Hadi Tjahjanto.

“The last contact with the missing submarine was 03.00 WITA (Central Indonesian Time) Wednesday,” Tjahjanto noted.

The German-built submarine was manufactured in 1979 and has been in service since 1981.

Indonesian National Armed Forces have requested assistance from Singapore and Australia. (ILKHA)