NORTH LITTLE ROCK, Ark. (AP) — Three construction workers fell from a work platform that collapsed Wednesday and were presumed dead after falling from a highway bridge into the swollen Arkansas River.

The rescue operation turned into a recovery effort when there was no sign of the men for more than an hour after their fall, Little Rock Fire Capt. Jason Weaver said. Divers could not enter the water because the current was too swift.

Recovery crews hooked what appeared to be the fallen scaffolding, but the structure weighed as much as 10,000 pounds and officials decided to close northbound lanes on Interstate 430 so they could bring in a heavy-duty crane.