HOUSTON - Investigators are trying to figure out what caused two 18-wheelers to catch fire Wednesday evening.
It started at a pipe yard on Highway 90 and Miller Road in Sheldon around 6:30 p.m. Wednesday.
Firefighters said they used extra caution because of the chemicals located near the flames.
Officials said two big rigs were destroyed by the fire.
No one was hurt.
A Harris County Fire Marshal's Arson Unit is investigating.
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