WASHINGTON — Thousands of Dominion Power customers were without in Loudoun County overnight.

Most of the affected customers were in the area between Purcellville and Leesburg.

The outages were down to about 50 customers as of 5 a.m. Wednesday. More than 23,000 were originally without power around 10 p.m. Thursday.

Dominion Power told WTOP they believed the problem was related to an underground cable issue.

Customers can check Dominion Power’s outage map here.

Stay with WTOP.com for updates on this developing story.