Big Island police say two students at Hilo High School were arrested in connection with a small explosion Thursday morning.
No one was injured in the incident.
Hawaii Department of Education spokesman Alex Da Silva says the small device that exploded at the school is being described as a "bottle bomb." He says it went off around 11:15 a.m. outside the auditorium of the Big Island school.
Police recovered the remnants of a plastic liquid container and an unidentified liquid substance. The only damage was residue.
The DOE says classes were in session and, although there was a class inside the auditorium, no students or staff were near the area where the device exploded.
Da Silva says the school was under lockdown while police and fire officials investigated. A sweep of the campus was conducted to make sure there were no other devices on campus.
At around 12:50 p.m., an all clear was given and the lockdown was lifted. Students resumed classes and will be released the regular time of 2:20 p.m.
Two 16-year-old boys were arrested in the incident.
The school of about 1,250 students is on the east side of the Big Island.
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