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.

READ MORE: Suspected Shoplifter Shot By Police After Pulling Weapon At The Falls Shopping Center In SW Miami-Dade

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

One neighbor described the flames.

READ MORE: CDC's New Mask Mandate Encourages People To Get COVID Vaccinations

“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.

MORE NEWS: 'There's More Aggression, More Confrontational Attitude': Miami Beach Police Chief On Increasing Safety, Security

Firefighters said the home is a total loss.