BRENTWOOD -- A missing 18-year-old man with the mental capacity of a child has been found, police announced Sunday.

Brentwood resident Kolton Chalk disappeared around 3:45 p.m. Saturday while riding a three-wheeled purple bicycle with a basket, police said. He reportedly has the mental capacity of a 3-year-old child.

Police didn't release any details on Chalk's return to his family.

Contact Joshua Melvin at 650-348-4335. Follow him at Twitter.com/melvinreport.