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The Sheppey Crossing has now reopened after debris was left scattered over the carriageway.
Police closed off part of the Maidstone-bound stretch of the A249 after what appeared to be building materials fell off a vehicle.
It happened at about 8am and traffic was being diverted via the Kingsferry Bridge.
Police officers were helping to remove the debris.
It was clear by 10.45am.
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