Officials think a fire that damaged four classrooms in the old John Marshall High School building was intentionally set.
Arson investigators are looking into the cause of a Saturday fire at the empty school, Fire Battalion Chief Brian Stanaland said. The utilities to the building had been turned off.
There was no damage estimate because the building is scheduled for demolition.
Oklahoma City Public Schools is in the process of selling the old school, district spokeswoman Kathleen Kennedy said Monday.
The old John Marshall High School was built in 1945. The property includes the 240,000-square-foot facility and 20 acres of land.
The school board agreed in August to sell the building to Premier Assets Inc. for $400,000. The building will be torn down, Kennedy said.
The sale is on hold until the city council considers whether to rezone the property as residential, Kennedy said. The issue is expected to come before the council soon, she said.
Two previous offers to buy the property and old school building haven't worked out.