Arsonists have struck at a fuel yard in Essex, destroying four lorries.
Fire crews, called to the fire at West Station Yard, Maldon, Essex, at 1840 GMT on Saturday, prevented the fire from spreading to fuel storage tanks.
Essex Police issued an appeal for help to trace a group of teenagers seen running away from the scene moments after the fire began.
Police said that CCTV showed a boy running across the yard before and after the fire.
A police spokesman said: "We are obviously keen to identify him and would like parents and friends to help us with our enquiries."
Divisional Officer Andy Stapleton, of the Essex Fire and Rescue Service, said: "Crews worked excellently to prevent the fire from spreading to fuel storage tanks in the yard.
"The fire affected four lorries in the yard."
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