CHICAGO (CBS) — There are reports Friday morning an electrical problem may be to blame for a fire in the noble horse stables in old town last night.

Five carriages were burned at the Noble Horse Theatre and carriage ride stables, at 1408 N. Orleans St. in the Old Town neighborhood, but all the horses escaped safely. No horses or people were injured.

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The fire broke out around 9 p.m. Thursday in the area where carriages are stored, fire officials said.

Initially, the fire was considered suspicious because flames were blazing in two places. But quoting a stable representative, the Chicago Tribune reports the fire actually started when electrical wiring fell onto one of the carriages.

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The Noble Horse supplies the iconic carriages that are seen along the Magnificent Mile.

The adjoining theater, which apparently was not damaged by the fire, mounts a variety of equestrian productions. Quadrille, a live performance featuring 20 horses and evoking 18th century Europe, is currently playing.

Chicago fire investigators have not commented officially on what caused the fire.

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The Sun-Times Media Wire contributed to this report.