An explosion at Santa Ana Valley High School’s boiler room has prompted evacuations of students and staff from part of the school, according to news reports and sources.

Officials suspect a problem with a water boiler caused the 7:30 a.m. Tuesday explosion, reports the Orange County Register. The Orange County Fire Authority said no one was injured, according to the Register

As of 9:30 a.m. students were still evacuated in the auditorium, according to a source familiar with the situation, adding that students near the explosion were hit by water and mud.

— NICK GERDA

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