Overview

• The boy went missing Sunday evening after swimming with friends near the Seaforth radar tower.
• Multiple emergency units, including a coastguard helicopter, are involved in the search.
• Authorities have cordoned off the area and are asking the public to stay away.
• The search operation includes the RNLI, police, fire and rescue teams, and ambulance services.
• Crosby beach, a popular spot, remains closed to facilitate the search efforts.