WATCH: Stage Collapse at California School Injures 25

Dozens of students were hospitalized Sunday after a stage collapsed during a performance at a California high school.

The stage at Servite High School, an all-boys Catholic high school in Anaheim, collapsed while 250 girls from its sister school were singing and dancing on the platform. The students fell around five feet, and 25 students were sent to the hospital with injuries ranging from cuts and bruises to broken bones, SF Gate reports.

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Anaheim Police Lt. Tim Schimdt said the stage probably collapsed from too many people jumping on it. “We’re lucky that no one was seriously injured,” he said. “It was a quick, sudden collapse, and the students fell right away.”

Authorities are investigating the school’s stage permit to make sure that everything was up to date, and are looking into whether there was a weight restriction. The stage was expanded in the 1980s to provide more performance space.

[SFGate]

Write to Charlotte Alter at charlotte.alter@time.com.