NEW YORK (KABC) — United Airlines lifted an hour-long ground stop after halting all domestic flights due to a computer issue, airline officials said Sunday afternoon. The Associated Press contributed to this report. We?re working to get flights on their way. We apologize for the inconvenience to our customers.— United (@united) January 23, 2017 The lift comes after a tweet from officials at about 5 p.m. A ground stop is in place for domestic flights due to an IT issue. We apologize for the inconvenience.— United (@united) January 23, 2017 United spokesperson Maddie King issued a statement saying crews were working to fix the issue.”We have issued a ground stop for all domestic mainline flights due to an IT issue. UPDATE: The ground stop has been lifted. PT, which stated there was an “IT problem.” The airline did not give any more details, and it was not immediately clear how many flights were affected. We are working as quickly as possible to resolve this issue and get out customers to their final destinations. We apologize for the inconvenience to our customers.” United Airlines and United Express, based in Chicago, operate more than 4,500 flights a day to 339 airports across five continents. We?re working on a resolution.