Explosions have destroyed a gas plant in Lake County in the US state of Florida, injuring at least seven people, local media reported on Tuesday.
No one was killed in the explosions at the Blue Rhino propane-gas plant in Tavares, some 60 kilometres west of Orlando city, local authorities said, dpa reported.
"As tragic as it started out to be, it's looking like a better situation," the Orlando Sentinel newspaper quoted Tavares mayor Robert Wolfe as saying.
All the employees who were at the plant for the night shift have been accounted for, the newspaper said. Three men taken to hospital with burns were listed in critical condition.
The first blast one hour before midnight blew off the plant's roof. Explosions in tractor-trailers loaded with propane tanks outside the plant followed, Tavares fire chief Richard Keith told the Sentinel.
He said there was "no indication whatsoever" how the fire or explosions started.
All 53,000 nine-kilogramme propane cylinders at the plant are believed to have exploded, Tavares city spokeswoman Joyce Ross told the Sentinel.
Online pictures showed a huge fire lighting the sky and massive columns of smoke rising from the plant.