PHILADELPHIA (WPVI) -- It was a tense start to the school day for students in Northeast Philadelphia who were evacuated after a report of a strong odor of gas.
Students and faculty were told to exit Philadelphia Academy Charter High School on the 1700 block of Tomlinson Road just before 7:30 a.m. Wednesday.
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Chopper 6 was overhead as students gathered out front of the school.
Philadelphia Gas Works was notified and students were allowed back inside about an hour later.
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Investigators say there was a spill in the chemistry lab which caused the odor.
It was cleaned and cleared by a hazmat team.