South River High School in Edgewater was on lockdown Thursday afternoon out of an abundance of caution, according to officials.
The Anne Arundel County Police Department began investigating the well-being of an 18-year-old male who was believed to be heading towards the area of the High School. Numerous officers were in the area looking for the male.
The lockdown has since been lifted and students were dismissed as normal.
The critical missing 18-year-old was located on Thursday evening. Officers found his vehicle on Solomons Island Road near Lee Airport.