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Flames erupted Saturday at the abandoned Midvale Middle School, which was already set for demolition.

The fire began about 7 p.m. at the school, 7852 S. Pioneer St. Firefighters were containing the flames to the old gymnasium and swimming pool area, which are on the north side of the building, said Unified Fire Authority spokesman Dave Ulibarri.

Firefighters received second-hand statements that people may have been inside the building. But firefighters searched the safe areas of the school and did not find anyone, Ulibarri said.

The school was scheduled to be demolished at the end of the month.

The cause of the fire remained unknown.

The flames were mostly out as of 9:35 p.m. Firefighters were to stay at the school into Sunday to douse any hot spots, Ulibarri said.

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