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.
Adam Shacknai was on the stand Monday, as testimony continued in the wrongful death lawsuit of Rebecca Zahau.
A San Diego hiker who was rescued last Thursday after being stranded in Joshua Tree for five days shared his incredible story of survival.
Monday was a special day for some local students. They were sporting new school shirts which they got to design themselves, all thanks to the Larry Himmel Neighborhood Foundation.
A motorist lost control of her car on a South Bay street Monday, sending it crashing into four other vehicles before overturning and coming to rest upside down in the roadway.
Jurors deadlocked Monday in the retrial of an oft- deported Mexican citizen accused of driving drunk and causing a hit-and-run crash that seriously injured a 6-year-old boy in San Ysidro.
As the school year progresses, now is the time parents are thinking about what to do with their kids over the summer break.
Young people are making a huge difference in our community. Kids4Community founder Kenan Pala, 14, is putting together, with a group of teen volunteers, the Bright Futures 5K.
Get your kids in the kitchen with you! Cafe 21 will host a kids’ cooking and craft class Thursday, March 22nd to celebrate Easter and spring.
Caltrans is undertaking a six-week experiment on eastbound state Route 78 in Vista to study whether getting motorists to slow down could actually speed up their commute.
A warming trend that began Sunday in most of San Diego County will continue Monday with dry and warmer weather expected to continue until the middle of this week.