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.

The fire has reached three alarms.

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

There is no word on any injuries.

Investigators have not yet determined the cause of the blaze.