TUSTIN (CBSLA.com) — A fire Saturday morning caused an estimated $50,000 in damage to the old gym at Tustin High School.

Authorities said there were no injuries.

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The fire was reported around 10:53 a.m. at the school located at 1171 E Camino Road.

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The Orange County Fire Authority said 35 firefighters battled the blaze and had it under control by 11:35 a.m.

The cause of the fire remains under investigation.

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