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A tractor trailer traveling on northbound I-495 somehow flipped over, spilling fuel and its load of blueberries onto a ramp in Oxon Hill. The Exit 2B ramp toward Washington was completely shut down as crews work to erect and remove the trailer and clean up the spill.

As of 10 a.m., one lane remains reopen to allow traffic to get by the scene. A second truck has arrived on the scene to load the blueberry cargo. 

Special airbags were used to upright the tractor trailer. Once the scene is completely clear, both lanes will be reopened. 

It's still unclear what exactly happened, but police say this appears to be a single-vehicle accident involving only the tractor trailer.

Fire officials say the accident happened just after the Woodrow Wilson Bridge around 2 a.m. Tuesday morning.

One person was treated at the scene and later released. No major injuries were reported.