Major traffic delays are being reported on Interstate 93 south near Boston Thursday morning after a tractor trailer scraped the top of the O'Neill Tunnel.

The incident, according to reports, forced lane closures and halted traffic.

Major delays continued as of 8:45 a.m.

Debris from the tractor trailer fell onto two cars, disabling them, state police said.

No injuries were reported.

Watch for developments in this story.

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