NORTH BEND, Wash. (AP) — Rescue crews are spending their fourth straight day looking for a skydiver who vanished during a jump above Washington’s Cascade foothills.

King County sheriff’s Sgt. Cindi West says searchers were back out near 4,200-foot Mount Si east of Seattle at first light Sunday, hoping to find 29-year-old Kurt Ruppert of Lake City, Fla.

Ruppert hasn’t been seen since he jumped out of a helicopter at 6,500 feet Thursday afternoon, wearing a special wing suit with fabric under the arms to allow him to glide like a flying squirrel.

Crews narrowed their search area on Saturday, based on data from Ruppert’s cell phone and the helicopter’s flight path, but still haven’t found any sign of him.

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