A Salt Lake man riding a bicycle was killed Saturday when a four-wheel-drive vehicle attempted to pass him.

Walter R. Christensen, 21, was riding on Highland Drive near 3700 South about 11:15 p.m. when a Jeep Cherokee driven by Michael B. Potts struck Christensen from the rear. The impact carried the bicyclist about 60 yards.Christensen was taken to University Hospital where he later died of massive head and chest injuries, a nursing supervisor said.

Potts was arrested at the accident scene for driving under the influence of alcohol.