Water Main Break Shuts Down I-93 Exit In Downtown Boston

BOSTON (CBS) -- A water main break flooded Summer Street and closed an I-93 exit late Sunday night.

The flooding forced authorities to shut down Exit 20A in the O'Neill Tunnel and left several inches of water on Summer and High streets.

There's no word yet on what caused the break.

The road re-opened around 6 a.m. Monday.