This story has been updated.
Both the right and center lanes have reopened on a stretch of I-684 after a serious crash caused their closure for more than two hours on Thursday afternoon.
The northbound crash occurred at Route 35 (Exit 6) in Katonah with stopped traffic at the scene and stop-and-go delays back to Route 172 (Exit 4) in Bedford before the lanes reopened just before 4 p.m.
Hour-long delays were reported.
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