This story has been updated.
Two lanes that had been closed following a crash, causing gridlock on a stretch of northbound I-684 late Monday afternoon, have now reopened.
The crash occurred at Route 172 (Exit 4) in Bedford, with stopped traffic at the scene and stop-and-go delays to Route 22 (Exit 3) in Armonk.
The center and right lanes reopened by 5:30 p.m.
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