A search was underway Monday after a suspected smuggling boat capsized off Del Mar, killing three people. Early reports indicated nine people were missing and four survivors were located, a U.S. Coast Guard spokesperson said. The overturned boat was discovered just north of Torrey Pines State Beach around 6:30 a.m. A survivor who was interviewed told first responders that nine people were missing, including one or two children, Coast Guard spokesperson Hunter Schnabel said. Personnel from several agencies were involved in the search, including Coast Guard and San Diego Fire-Rescue helicopters, a 45-foot Coast Guard response boat, and lifeguards in rescue boats and personal watercraft. Some people were combing the beach on foot. "There are quite a few agencies involved currently," Schnabel said.