An air and ground search Sunday in the foothills above Davis County ended with the arrest of a Bountiful man following an altercation at an all-night party at the Buckland Flats picnic area.

The search began at 5:50 a.m. Sunday following a report of an aggravated assault in which one man was struck with an object and another was struck by a vehicle at the picnic area, according to the Davis County Sheriff's Department.Authorities first believed Robert A. Thompson was shot with a 20-gauge shotgun, but it later was determined that Thompson had been struck with the butt of a shotgun, which discharged without striking anyone. While leaving the scene, witnesses told police, a small pickup truck struck Scott Wilden, no age or address given.

Davis County paramedics responded, along with Bountiful police.

A search began, with sheriff's deputies setting up roadblocks at Buckland Flats near the B on the mountain and where the Skyline Road above Buckland comes out near the Farmington Canyon area, a dispatcher said.

A University Hospital air ambulance helicopter that picked up Wilden flew over the canyon area and aided in the search, officials said.

Meanwhile, physicians at Lakeview Hospital in Bountiful determined that Thompson, no age available, had not been shot in the head but had lacerations consistent with being struck with an object. He was treated and discharged.

Wilden was in serious but stable condition after surgery at the University Medical Center for fractured left leg bones, a nursing supervisor said.

Buckland Flats is a popular beer-drinking and keg party site on Forest Service land above Bountiful and has been a law enforcement headache for the sheriff's department, Bountiful Police and Forest Service for many years.

John Carroll, 21, was arrested at a roadblock and booked into Davis County Jail for investigation of aggravated assault.