Pearl City High School was kept on lockdown for about two hours Friday after several fights broke out on campus, according to the school's principal.
Principal Carlyn Fujimoto said two girls got into a fight Friday morning that staff quickly "quelled."
Just before lunch recess, several fights broke out as a result of the initial fight.
Staff called for a lockdown while they successfully broke up the fights.
A 16-year-old boy was restrained and taken to the hospital as a precaution because he was hyperventilating, according to Fujimoto.
A 16-year-old girl, who was a bystander, was also treated for breathing problems related to an asthma condition.
Students were kept on lockdown until the end of school at 2:15 p.m. and escorted off campus as a safety precaution.
Fujimoto does not think this will be an ongoing safety issue that would require additional security.
On Monday, the school staff will debrief to assess whether everything was handled according to procedure. Fujimoto said the staff did an excellent job responding.
The principal is also writing a letter to parents that will be posted on the school's website and mailed out on Monday.