Hundreds of volunteers on Saturday searched Salt Lake City for a missing 30-year-old man.

Paul Swenson was last seen Tuesday afternoon in American Fork. The car he was driving was found unoccupied on Wednesday morning at Park View Elementary, 970 Emery Street (1150 West), in Salt Lake City, according to American Fork police Sgt. Adam Stowers.

In addition to the car being found in an unexpected location, police called the circumstances "suspicious" because Swenson missed an appointment in Salt Lake City and turned his phone off.

Also, prior to leaving for his appointment, Swenson "wasn't acting like himself," family members reported to the police.

Swenson has red hair, is 6 feet tall and about 190 pounds.

Anyone with information should call the Utah Valley Dispatch at 80-1-794-3970.

tfrandsen@sltrib.com

Twitter:@ tiffany_mf