Emergency workers in Minneapolis have shifted their focus from searching for survivors to trying to recover the bodies after a major bridge collapsed into the Mississippi River during rush-hour traffic on Wednesday.

The collapse happened shortly after 6 p.m. local time, sending a massive cloud of dust into the sky and terrifying onlookers during the height of rush hour.

At least seven people were killed in the dramatic collapse and 60 were taken to hospital. About 20 people are still missing and may have been involved in the collapse, and the death toll is expected to continue to rise.