Firefighters battled an outdoor fire that ignited in a large pile of cardboard and wood pallets at a Livermore packaging company on Sunday night.

The incident unfolded after 9 p.m. Sunday outside Heritage Solutions on Brisa Street, not far from the Vasco Road-Interstate 580 interchange.

A fire sparked for unknown reasons among the cardboard and pallets -- product the packaging company intended to ship -- that was stored outside that night, according to Joe Testa, deputy chief of the Livermore-Pleasanton Fire Department.

Crews gained control of the fire after about 30 minutes, and the flames were fully extinguished after around four hours, according to Testa. Firefighters prevented the flames from spreading to the building, though it was being threatened.

There were no injuries to employees or firefighters. The cause of the fire remains under investigation. The Alameda County Fire Department assisted LPFD in the firefighting response.