United Airlines briefly grounded all of its domestic flights on Sunday because of a computer problem.
Company spokeswoman Maddie King said in a brief statement that it issued a ground stop in the U.S. because of an "IT issue."
A ground stop is in place for domestic flights due to an IT issue. We’re working on a resolution. We apologize for the inconvenience.
— United (@united) January 23, 2017
It did not give any more details, and it was not immediately clear how many flights were affected.
Chicago-based United Airlines and United Express operate more than 4,500 flights a day to 339 airports across five continents.
