Star Spencer High School was evacuated Thursday after a threat was made, school officials said.
Oklahoma County deputies gave the all-clear shortly after 1:30 p.m. Thursday.
The threat became known Thursday morning and students and staff left the building a short time later.
The Oklahoma County Sheriff's Office said the school received a bomb threat over the phone.
The department's bomb squad is checking the building. Students and staff were taken to a safe location off campus.
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