TWIN FALLS, Idaho (AP) — A Twin Falls County sheriff's spokeswoman says two men have been seriously injured in a BASE jumping accident off the Perrine Bridge in Twin Falls, Idaho. The bridge spans the Snake River canyon. KTVB reports that sheriff's spokeswoman Lori Stewart said the men jumped shortly after 5 p.m. Monday and neither of their parachutes opened. One man was taken to Saint Luke's Magic Valley Medical Center. Stewart says the other man suffered life-threatening injuries and has been airlifted to St. Alphonsus Regional Medical Center in Boise. BASE jumping is a popular sport in southern Idaho, where participants jump off of the 486-foot high Perrine Bridge, using a parachute to break their fall.