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JOHNSTON, Iowa–Some drivers in Johnston couldn’t believe what they saw drive past them. A truck caught fire and rolled past them Friday night.

Authorities say the driver figured his truck’s fuel pump may have somehow ignited the fire. The driver and his girlfriend got out of the truck. But the driver thinks the fire melted the truck’s parking truck, causing the truck to roll downhill.

The truck rolled down Beaver Avenue until it finally stopped in someone’s yard. No one was hurt.