Authorities say one of two workers buried in concrete at a Tennessee construction site has died and the other has been taken to a hospital in critical condition.

Police Lt. Mike Tinnel tells The Knoxville News Sentinel that a form for a 30-foot wall collapsed during a concrete pour Monday afternoon at the Lenoir City Utilities Board sewage treatment plant.

Deputy Fire Chief Tony Brock says rescue crews used rappelling equipment and baskets to pull the workers from the concrete.

Tinnel says one of the workers later died. Their names aren't being released until families are notified.