The cause of a massive explosion after two vehicles collided on a Chinese highway remains a mystery.
Incredibly, no one was hurt in the massive blast which occurred when a truck clipped a another that was on the side of the highway early Monday near Hangzhou in China's Zhejiang Province.
The incident was captured on surveillance cameras and the collision does not initially appear to be significant.
"The explosion went off just at the collision. I didn't even see how it happened. I just heard a big boom and it had occurred," on of the drivers, named Zhang, told authorities.
The highway was closed to 90 minutes while early investigations show the truck was carrying steel products and the other vehicle had paper and paints on board.
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