Girl, 11, in custody after bomb threat on first day at Philadelphia middle school: police

A scary first day back for one Philadelphia middle school after police say a bomb threat sparked an evacuation just as classes began.

Officers responded to Baldi Middle School in the city's Bustleton section around 8:30 a.m.

They were alerted to threats made by phone, according to authorities. Details of the threat have not been released.

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Homeland Security ordered the entire school to evacuate as they searched the building.

No device or weapons were found, and no credible threat was posed, police say.

An 11-year-old girl was taken into custody, but police have yet to release further details.