People driving along I-79 in Mercer County early Monday had to give plenty of room to firefighters trying to extinguish flames that spread through a tractor-trailer carrying food.

The driver of the Shop 'n Save truck pulled over at around 2 am and managed to unhitch the burning trailer as firefighters from Jackson Township and Mercer East End were called out.

Firefighters say it took a lot of work to put out the flames. Crews had to unload about one-third of the truck's cargo of food.

There's no word on what caused the fire.