WILLOW GROVE, Pa. (CBS) — Firefighters battled a multi-alarm blaze at a high-rise apartment building in Montgomery County on Thursday evening.

Crews responded to Regency Park Towers on the 1100 block of Easton Road in Willow Grove around 5:30 p.m.

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The fire has reached three alarms.

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The building was evacuated and warming buses were sent to the scene to assist with displaced residents.

There is no word on any injuries.

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Investigators have not yet determined the cause of the blaze.