Police are searching after an inmate escaped from a worksite at the Jacksonville Fairgrounds downtown Thursday night.

Gary M. Thigpen, 23, who is in jail on petit theft charges, reportedly walked off the fairgrounds wearing an orange shirt, blue pants and black shoes (the inmate's uniform), says the Jacksonville Sheriff's Office.

Authorities reported him missing from the site at 4:22 p.m. and after an extensive search, including checking in with known contacts and addresses, officers couldn't find him.

He's 5-foot-1, 135 pounds.

Anyone with information on Thigpen is asked to call the sheriff's office at 904-630-0500. To remain anonymous and receive a possible cash reward, call Crime Stoppers at 1-866-845-TIPS.