School Bomb Threat
Police evacuate thousands of students from the football field to the gymnasium after a missing Navy medic left a note claiming he planed explosives a...
Police evacuate thousands of students from the football field to the gymnasium after a missing Navy medic left a note claiming he planed explosives at the high school in San Clemente, Calif., Wednesday, Sept. 7, 2011. (AP Photo/Lori Shepler)
School Bomb Threat
Police evacuate thousands of students from the football field to the gymnasium after a missing Navy medic left a note claiming he planed explosives i...
Police evacuate thousands of students from the football field to the gymnasium after a missing Navy medic left a note claiming he planed explosives in the school at San Clemente High School in San Clemente, Wednesday, Sept. 7, 2011. �Bomb squads did not find any explosives on an initial sweep but are continuing to search the large campus. A search was launched for the missing medic, but officials do not believe any military-grade explosive was stolen from the base, said Marine Lt. Joshua Benson. (AP Photo Lori Shepler)
School Bomb Threat
Police evacuate thousands of students from the football field to the gymnasium after a missing Navy medic left a note claiming he planed explosives a...
Police evacuate thousands of students from the football field to the gymnasium after a missing Navy medic left a note claiming he planed explosives at the high school in San Clemente, Calif., Wednesday, Sept. 7, 2011. (AP Photo/Lori Shepler)
School Bomb Threat
Police evacuate thousands of students from the football field to the gymnasium after a missing Navy medic left a note claiming he planed explosives i...
Police evacuate thousands of students from the football field to the gymnasium after a missing Navy medic left a note claiming he planed explosives in the school at San Clemente High School in San Clemente, Wednesday, Sept. 7, 2011. �Bomb squads did not find any explosives on an initial sweep but are continuing to search the large campus. A search was launched for the missing medic, but officials do not believe any military-grade explosive was stolen from the base, said Marine Lt. Joshua Benson. (AP Photo Lori Shepler)
School Bomb Threat
Parents and friends look on as police evacuate thousands of students from the football field to the gymnasium after a missing Navy medic left a note ...
Parents and friends look on as police evacuate thousands of students from the football field to the gymnasium after a missing Navy medic left a note claiming he planed explosives in the school at San Clemente High School in San Clemente, Wednesday, Sept. 7, 2011. �Bomb squads did not find any explosives on an initial sweep but are continuing to search the large campus. A search was launched for the missing medic, but officials do not believe any military-grade explosive was stolen from the base, said Marine Lt. Joshua Benson. (AP Photo Lori Shepler)
School Bomb Threat
This image provided by the Orange County Sheriff's Department shows Daniel Morgan, 22, a Navy medic who went AWOL at Camp Pendleton Marine Corp base,...
This image provided by the Orange County Sheriff's Department shows Daniel Morgan, 22, a Navy medic who went AWOL at Camp Pendleton Marine Corp base, Calif., Wednesday Sept. 7, 2011 after leaving a note in his quarters claiming he planted bombs at a nearby high school, forcing the evacuation of thousands of students and staff on the first day of school. (AP Photo/Orange County Sheriff's Department)
A Navy corpsman turned himself in Wednesday after leaving a threatening note claiming he planted bombs at a nearby Southern California high school in a hoax that prompted administrators to order students out of the building on the first day of classes.
Daniel Morgan, 22, surrendered at Camp Pendleton Marine Corps base at around 1 p.m. local time Wednesday, Master Sgt. Mark Oliva said.
Morgan was last seen at the base at 5 p.m. local time Tuesday, Orange County sheriff's spokesman Jim Amormino said. When he failed to show up for work Wednesday morning, his barracks were searched and a note was discovered, he said.
Morgan wrote that he had placed explosive devices in and around San Clemente High School, which is located just a few miles from one of the gates to Camp Pendleton, Amormino said.
Soon after the note was found, about 3,200 students and 180 faculty members were told to leave the school's buildings. Students and staff waited on the school's football field _ and later in the gymnasium, auditorium and other rooms _ as bomb squads searched through buildings and classrooms. After about four hours, everyone was sent home.
No bombs had been found by late Wednesday afternoon. Also, officials didn't believe that any military-grade explosives were taken from the base, Marine Lt. Joshua Benson said.
Morgan was being interviewed by military authorities and could face a military charge of unauthorized absence after failing to report to duty, Oliva said.