FRESNO, Calif. (KFSN) -- An investigator is working to figure out what sparked a fire that burned three big rigs in West Central Fresno.
It happened after 1:30 on Tuesday morning near Shields and Polk.
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Fire crews arrived to find one semi engulfed in flames, a second partially burned, and a third rig with minor damage.
Firefighters were able to put the flames out quickly.
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No one was in the semis, and no one was hurt.