TARRYTOWN, N.Y. (CBSNewYork) β€” A tractor-trailer hauling scrap metal overturned Friday morning on the Tappan Zee Bridge, snarling traffic for a time in both directions.

The crash happened around 9 a.m. on the northbound side of the bridge.

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It’s unclear what caused the truck to lose control. Images from the scene showed the overturned truck with pieces of scrap metal and debris all over the roadway.

Video showed the truck sending debris and two wheels flying across the road.

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Police said all lanes on the bridge were closed for some time after the accident.

The driver of the truck was not hurt.

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The New York State Thruway Authority said there were no lanes closed before the accident, and there was no construction going on at the time.