A San Antonio bound tractor-trailer rig filled with beer caught on fire Friday night in far South Bexar County, destroying untold gallons of brew.

No injuries were reported.

A Sheriff's Office dispatcher said the 18-wheeler was northbound on Interstate 35 near Sheppard Road around 9:30 p.m. when it suddenly caught fire.

Deputies said the cause of the blaze wasn't immediately clear, and they weren't sure if any beer spilled onto the roadway, a rural stretch of interstate close to the Atascosa County line.