UPDATE: The water main break off Old Lee Highway has been repaired.

The leak left thousands of people without water or low water pressure for hours. Eastside Utility crews spent most of the day installing a new pipe to fix the problem.

They're telling people who were affected to flush their lines with cold water for a few minutes.

The cause of the water main break is still unclear. Managers with the company said it could be days or even weeks before they know what happened.

UPDATE: Several water main breaks are affecting residents in Ooltewah near the Hunter Glen Subdivision and Homewood Subdivision, as well as areas east.

Residents were greeted Monday morning with low or no water pressure due to a large water main break. There's no estimate on how many of Eastside Utility District's 20,000 customers are affected.  

Wallace A. Smith Elementary was affected initially, but their service has been restored. No other schools were directly affected.

The break happened in the 8700 block of Old Lee Highway.

Eastside Utility District crews are working to get the main repaired as quickly as possible. 

It is unknown when the repairs will be complete.