More than 1,000 students had an unplanned day off after fire damaged their Dallas-area school.
Classes were canceled Tuesday at Webb Middle School in Garland.
Investigators say a custodian around 10 p.m. Monday reported fire in an unoccupied classroom of the school, which has about 1,300 students.
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No injuries were reported.
The cause of the blaze, which left several classrooms damaged due to fire or water, is sought. A damage estimate is being compiled.