Published: Oct 11, 2010 3:59 PM EDT
Updated: Oct 11, 2010 12:59 PM EDT

ROYAL PALM BEACH, Fla. (AP) - The Palm Beach County Sheriff's Office is investigating the deputy-involving shooting of a 17-year-old mentally challenged teenager.

Officials say the teen's mother called to report her son missing Sunday evening, stating the teen left their Royal Palm Beach home in her white Dodge Caravan.

According to investigators, a deputy located the vehicle and activated his lights. Another deputy spotted both vehicles and attempted to assist his colleague.

Deputies say that when all three vehicles came to a stop, the teen accelerated toward one of the deputies, who then fired at the teen. The teen continued driving and crashed into another vehicle.

The 17-year-old boy was taken to St. Mary's Medical Center in critical condition.