UPDATE 5:10 p.m.:
Los Angeles County Fire Department officials say they are working with U.S. Forest Service firefighters and are making good progress with the fire.
The fire is not near any structures.
Original story:
A brush fire erupted Tuesday at about 4:04 p.m. when a tractor-trailer carrying hay caught on fire on northbound Interstate 5 north of Templin Highway.
The hay bales caught fire and ignited the brush on the west side of the freeway, according to the California Highway Patrol.
As of 4:40 p.m. the fire was burning uphill in 4- to 5-mph winds and had grown to 5 acres.
No structures are reported to be threatened. The fire is on U.S. Forest Service land.
Hay Truck Fire Ignites Brush North of Castaic
