LAUDERDALE-BY-THE-SEA (CBSMiami) – An investigation is underway after a massive overnight house fire in Lauderdale-by-the-Sea.

According to the fire department, a total of three firefighters – two from Lauderdale-by-the-Sea and one from Fort Lauderdale – were taken to the hospital for smoke inhalation and later discharged.

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The two people who live inside, as well as their pets, were also treated.

One neighbor described the flames.

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“You saw them, they were quite high, maybe twice as high as the house, and they burned severely” said Rick Doremus. “The whole house was engulfed in fire.”

He said a propane tank may have exploded, sparking the fire.

However, fire investigators haven’t given a cause as they continue working to figure it out.

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Firefighters said the home is a total loss.