WASHINGTON -- Authorities are searching for a missing Philadelphia man whose car was discovered in Wharton State Forest Sunday.

John Kohlbecker, 27, was last seen leaving work in Philadelphia on Thursday, according to a release by the New Jersey State Police.

A white 1995 Toyota Camry belonging to Kohlbecker was found at the Green Bank State Forest Station in Wharton State Forest on Sunday, the release states.

Kohlbecker is described in the release as a white male of average height and build, with blonde hair and blue eyes. According to the release, Kohlbecker may also be "at-risk."

State police are asking anyone who can help locate Kohlbecker to call 911 or contact the New Jersey State Police Major Crimes Unit at 609-561-1800 ext. 3355.

Vernal Coleman can be reached at vcoleman@njadvancemedia.com. Follow him on Twitter at @vernalcoleman. Find NJ.com on Facebook.