Updated at 11:16 a.m.

An official with Virginia American Water said repairs to a water main break and the roadway on northbound U.S. Route 1 near King Street in Alexandria should be completed and roads reopened within the next two hours.

The eight-inch water main break caused roads in the area to be closed for much of the morning. Water is now back on for about 20 customers.

Updated at 9:03 a.m.

Crews are now working to fix an eight-inch water main break on northbound U.S. Route 1 near King Street in Alexandria, an official said.

The southbound lanes are open.

Water is shut down on part of North Patrick Street from King Street to Cameron Street. An official with Virginia American Water said about 20 customers are affected. The repairs are likely to take at least four to eight hours.

Updated at 8:24 a.m.

Some lanes are getting by on northbound U.S. Route 1 at King Street in Alexandria, as crews work to repair a water main break.

An official with Virginia American Water, the utility company in that area, said in an email that crews had been working to fix the break all night, but at first had troubles locating the exact break spot. Samantha Villegas, a spokeswoman for the water company, said crews believe it is an eight-inch main. Water is still on in the area for now, she said.

Once the leak is located, she said, repairs could take between four and six hours.

Water main breaks, she said, are likely due to age or cold weather.

Original post at 6:06 a.m.

Part of northbound U.S. Route 1 at King Street in Alexandria is blocked Wednesday morning as crews are trying to fix a water main break.

Utility companies warn that customers should expect more water main breaks with the extremely cold temperatures hitting the D.C. region.