One worker has been killed and two seriously injured in a fracking accident at an oil or gas well site in northern Colorado.
Three men were trying to heat a frozen high-pressure water line when something went wrong and the line ruptured.
Weld County Sheriff spokesman Sergeant Sean Standridge said one man was hit by a stream of water and died from the impact. The accident happened near Mead, about 35 miles north of Denver, on a fourth day of frigid weather in the region.
The men were working for Halliburton, which Anadarko Petroleum contracted to perform fracking operations at the well.
The injured men - 48-year-old Thomas Sedlmayr and 28-year-old Grant Casey - were flown to hospital. The name of the man who was killed has not yet been released.