This story has been updated.
There are residual delays on northbound I-684 late Thursday afternoon after a serious crash with multiple injuries initially blocked the left lane.
The crash occurred just before 4 p.m. between Route 35 (Exit 6) in Katonah and Route 172 (Exit 4) in Bedford with stop-and-go delays to Route 22 in Armonk (Exit 3).
Multiple ambulances rushed to the scene.
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