A construction worker was killed and a tractor-trailer driver injured when an interstate overpass undergoing demolition collapsed in Cincinnati, Ohio.

Police Chief Jeff Blackwell called it a workplace accident, saying crews were taking down the old bridge when something went "terribly wrong."

"The big-rig driver is very lucky; in a matter of seconds his fate would have probably been different," Blackwell said.

The driver was taken to the University of Cincinnati Medical Center with minor injuries.

Fire officials said the tractor-trailer struck the collapsed section as the bridge hit the ground. They said the construction worker was killed in the collapse.