UPDATE: Two missing Columbia residents located

Columbia police say two people vanished overnight and may be driving west on I-70.

Columbia police say they have located two residents reported missing Sunday.

Lauren Ashley and Stephen Clithero were found by the Kansas Highway Patrol on Highway 35 south of Topeka. Neither are injured and their families are heading to Kansas to contact them.

Original story:

Police say two residents are missing and endangered after leaving their homes Saturday night and Sunday morning.

Lauren Ashley Pond, 23, was last seen at an independent living facility on Marquis Court around 2 a.m. Sunday. Staff there say they discovered she was missing around 8:30 a.m. when they found her bedroom window was open and the screen had been pushed out. Pond has life-threatening seizures and takes medication for them, but police say she does not have that medication with her. Pond is believed to have left of her own free will with Stephen Clithero, 32. Clithero's parents reported him missing around 11 p.m. Saturday. He took his parents' truck, a gray 2006 Ford F-150 with a Missouri license plate reading 2PM-261.

Police say Pond and Clithero stayed overnight at a Boonville hotel and left around 10 a.m. Sunday. They think the two are driving west on I-70 in Clithero's truck. Law enforcement along the I-70 corridor have been notified, as has the Kansas Highway Patrol.

Pond and Clithero are both mentally handicapped. Pond is a white female standing 5'6" tall and weighing 230 pounds. She has medium-length blonde hair. Clithero is a white male standing 6'3" tall and weighing 325 pounds. He has short black hair. As of Sunday afternoon, police did not have a photo of either.

Columbia police urge anyone with information about Pond and Clithero's whereabouts to contact either the Columbia Police Department or a local police department near their location.