There's another image on the linked story page that shows the outside of the truck, so it's defenitly a tanker truck. I'm still skeptical the bricks are pure gold. Judging the size of the tank from the outside picture it appears to be about 1/5th full and as Jaxxon says that'd wildly over load the truck.
However the soldiers moving the gold seem to be really struggling with each brick. Which they should considering a 1 litre(~1 quart) milk jug sized brick would weigh about 20 kilos
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