The Chester County Sheriff's Office is searching for an 18-year-old vulnerable adult who was reported missing Tuesday morning.
Alexander Porter, who has nonverbal autism, was last seen at a residence on Mount Pleasant Church Road during the early morning hours of Sept. 8.
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Deputies said Porter was last seen wearing only undergarments. He is approximately 6 feet 2 inches tall and weighs about 160 pounds.
The sheriff's office said its K9 Tracking Team and Drone Team are actively searching the area.
Anyone who has information about Porter's whereabouts is asked to call the Chester County Sheriff's Office at 803-385-5433