Elphbert Laforteza, a senior, was booked into jail Friday night, hours after the bottle-bombs went off in trash barrels during lunch.
He will be released from custody pending further investigation, said spokesman Paul Levikow of the San Diego County District Attorney's Office.
More arrests are anticipated and charges could be brought at a later date, Levikow said.
Besides the five crude homemade chemical bombs that exploded, three others were disabled by the bomb squad and officers found four others partially assembled in Laforteza's backpack, according to authorities.
Nobody was injured and no property was damaged in the explosions.
Laforteza told investigators he had brought a dozen of the bottle bombs to the Airway Road campus, said Maurice Luque, a spokesman for the San Diego Fire-Rescue Department.
Laforteza was an all-league football player and an ROTC cadet. He had applied but had not been admitted to the Air Force Academy, a spokesman for the Air Force said.
San Ysidro High Principal Hector Espinoza said Laforteza will receive his diploma but will not be allowed to graduate with his class on Thursday.
The public was invited Saturday to place American flags at grave sites at the Fort Rosecrans National Cemetery, in preparation for the
annual Memorial Day observance.
U.S. Sen. Kamala Harris, D-California, is scheduled to visit local Navy personnel in San Diego and Coronado next week, her office announced Saturday.
A 30-year-old Vista man was arrested for drunk driving and failure to yield Saturday morning after leading Carlsbad police on a high-speed pursuit that ended with the suspect crashing into a pole, according to authorities.
A man, possibly armed, and holed up inside a home in the Bay Park community for about four hours Saturday surrendered to police without incident.
Vacationing homeowners were hit by thieves in Mira Mesa, but thanks to a smartphone app, the crooks did not get away with it.
Signs warning people to stay out of the water are once again posted in Imperial Beach after a new spill from Mexico dumped hundreds of thousands of gallons of sewage into the Tijuana River - polluting the South Bay.
Two defense contractors were sentenced to prison Friday for conspiring to steal more than $3 million worth of medical equipment from Camp Pendleton that the military had planned to ship overseas to treat injured Marines.
It was all the buzz then, and four decades later people are still crazy over Star Wars. The original film opened 40-years ago this weekend and it was an instant sensation. News 8's Eric Kahnert went into our own archives to take us back to that day in history.
News 8's new mother Shannon Handy was walking with her mommy group Friday morning at Torrey Pines when an unexpected baby joined the group. Take a look!