EAST NORRITON TWP., Pa. (WPVI) -- East Norriton Middle School in Montgomery County was briefly evacuated following an unspecified threat.
Police say the threat came into the principal's office around 10 a.m. Monday.
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The building was quickly evacuated and students were taken to Norristown High School for lunch while authorities swept the building.
Nothing was found and students returned after about an hour.
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Officials believe the threat was a hoax.