FORT LAUDERDALE, Fla. (AP) — Two big rigs and two passenger vehicles collided and spilled diesel fuel across a Florida highway Thursday, sparking a massive fire that killed seven people and injured at least eight others, authorities said.

The wreck happened on southbound Interstate 75 about a mile (1.6 kilometers) south of Alachua, near Gainesville. The flames were fed by about 50 gallons (189 liters) of diesel, authorities said.

Authorities initially said six had died but late Thursday night revealed a seventh victim had perished. At least eight others were hospitalized, some with critical injuries, the Gainesville Sun reported. FHP Lt. Patrick Riordan said early Thursday evening that five of the accident victims who died were in a passenger van, and another person who died was in one of the tractor-trailers.

Vinnie DeVita said he was driving south at the time and narrowly escaped the crash -- he said it saw it happen in the rearview mirror, immediately behind him, according to a report by WKMG .

"If I had stepped on the brake when I heard the noise, undoubtedly, I would have been in that accident," DeVita said. "And then within probably 15 to 20 seconds of it all, it exploded. I mean, just a ball of flames."