Sunarbowo Sandi, head of the search-and-rescue team, said a sonar device was being used Tuesday to comb the murky bed of the 160-foot-deep (50-meter-deep) Mahakam River.

Some missing bodies are believed trapped inside sunken buses and cars. Sandi says that more than 30 divers are ready to recover them.

The 770-yard (700-meter) structure — built to resemble the Golden Gate Bridge in San Francisco — collapsed last week as a steel support cable snapped while repair work was being done.

The 10-year-old bridge linked the towns of Tenggarong and Samarinda in East Kalimantan province.