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Alex Horvath / The Californian

A hazmat crew returns after conducting a search at Bakersfield High School. The school was locked down but students will be released early while city firefighters and police investigate what appeared to be small explosions on campus. A battalion chief said multiple firecracker-type sounds were heard Monday morning. Battalion Chief Anthony Galagaza and police spokeswoman Michaela Beard confirmed three unspecified explosive devices at the school. The fire department was called just after 11 a.m. for something that exploded outside the science building. Within a few minutes, something blew up in a boys bathroom at Warren Hall and outside the Industrial Arts Building. No injuries were reported. Authorities are using hazmat gear as a precaution.

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Alex Horvath / The Californian

A hazmat crew returns after conducting a search at Bakersfield High School. The school was locked down but students will be released early while city firefighters and police investigate what appeared to be small explosions on campus. A battalion chief said multiple firecracker-type sounds were heard Monday morning. Battalion Chief Anthony Galagaza and police spokeswoman Michaela Beard confirmed three unspecified explosive devices at the school. The fire department was called just after 11 a.m. for something that exploded outside the science building. Within a few minutes, something blew up in a boys bathroom at Warren Hall and outside the Industrial Arts Building. No injuries were reported. Authorities are using hazmat gear as a precaution.

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Alex Horvath / The Californian

Hazmat crews examine material found on campus while conducting a search at Bakersfield High School. The High School was locked down but students will be released early while city firefighters and police investigate what appear to be small explosions on campus. A battalion chief told Eyewitness News that multiple firecracker-type sounds were heard Monday morning. Battalion Chief Anthony Galagaza and police spokeswoman Michaela Beard confirmed three unspecified explosive devices at the school. The fire department was called just after 11 for something that exploded outside the science building. Within a few minutes, something blew up in a boys' bathroom at Warren Hall and outside the Industrial Arts Bldg. No injuries were reported. Authorities are using hazmat gear as a precaution.

Three Bakersfield High School students were arrested Wednesday on suspicion of several felonies in connection with creating plastic bottle bombs that resulted in the cancellation of classes Monday.

Police spokeswoman Michaela Beard did not have the age of each student, but said they were 15 and 16 years old. She said they were arrested on suspicion of possession of a destructive device, possession of a destructive device near a place where people pass by, possession of substances or materials with the intent to make a destructive device and conspiracy.

BHS was placed on lockdown after three small explosions were heard on the campus late Monday morning. A noise was reported outside the science building, followed by an explosion inside a downstairs boys restroom inside Warren Hall and then a third explosion outside the industrial arts building.

No one was injured and there was no damage to the buildings.

Kern High School District spokesman John Teves has said the plastic watter bottles were filled with water and a common household chemical. Once sealed, the chemical and water react, produce pressure and the bottle eventually explodes.

- The Californian