Smoke Visible For Miles After Reported Explosion At Florida Hospital (UPDATED)

A hospital in South Florida was evacuated Friday afternoon after a reported explosion.

The building where the explosion occurred was under construction and workers were on a lunch break when the fire started, Local 10 reports. The blaze initially began in an electrical room, according to NBC Miami. Officials believe the fire subsequently led to a 100-pound propane tank exploding.

Cole Kingsberg told the Miami Herald he was inside the hospital when he heard a loud boom. "I thought a bomb went off,” he said. “Then I saw really thick, dark smoke.”

Smoke coming from the hospital was visible from miles away.