This story has been updated.
Two separate crashes caused delays on I-84 during the evening commute Thursday.
A crash taking out the left lane on the westbound side, reported just before 6 p.m. at I-684, is causing stop-and-go backups to Route 121 (Exit 21).
An earlier westbound crash, reported just after 5 p.m., occurred between Route 312 (Exit 19) and Route 311 (Exit 18) in Putnam.
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