Firefighters battle blaze at the former Manor Park Elementary School in Morrisville, Bucks County

MORRISVILLE, Pa. (WPVI) -- Firefighters endured sweltering heat Monday while battling a fire at a vacant school building in Bucks County.

Chopper 6 was over the scene at the former Manor Park Elementary School on Penn Avenue in Morrisville.

Authorities say the fire broke out around 11:30 a.m. Flames spread through the ceiling and roof before crews brought the blaze under control.

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No injuries were reported.

Officials are still investigating the cause of the fire.