Rescuers are still searching for six roadworkers who were on a bridge that was brought down by an out-of-control container ship in the US city of Baltimore last night.

But authorities say many lives were saved by a mayday call from the ship's crew, which prompted local officials to stop traffic driving onto the bridge before it collapsed into the river below.

Eight people are known to have been on the bridge at the time.

Two of them were rescued. The other six people are unaccounted-for.

Source : abc.net au