Searchers in central Indonesia said Monday the number of people confirmed killed in the collapse of a bridge has climbed to 11, with more than 30 missing and feared dead.

At least 39 people were injured when the 720-meter-long bridge, built to resemble San Francisco's Golden Gate, collapsed Saturday on Borneo island, hurtling dozens of vehicles into the murky Mahakam river.

Many of the missing are believed to be trapped in cars and buses at the bottom of the river.

Rescuers say underwater search efforts have not yet begun, because of fears that the bridge pilings are unstable and could collapse.