Major delays are being reported following two rollover crashes on Route 1 south on the Tobin Bridge near the Chelsea-Boston line.
There was no immediate word on any injuries.
The Massachusetts Department of Transportation said in a social media post that the right and center lanes are closed and delays should be expected.
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The scene was cleared and all lanes reopened around 11:30 a.m., MassDOT said.
No further details were released.
