Firefighters from several local departments responded to the scene of a fire at at 11 a.m. Saturday.
When fire crews from the arrived, the firefighters saw flames coming from the attic area on the side of the resturant, Assistant Chief Tom Brown said.
Crews went into service and the fire was quickly contained with little damage to the inside of the building, Brown said.
As groups of locals gathered to see what was happening, firefighters removed metal sheets and charred wood from the building.
Officials said the cause remains under investigation.
Feasterville, Northampton, Warminster, Willow Grove and the Tri-Hampton Rescue Squad assisted township crews.
As of Saturday afternoon, Las Margaritas was open for business.