United Airlines said the tech issue that led to the grounding of its flights for a few hours on Aug. 6 at major U.S. airports, including Chicago, Denver, and Houston, has been resolved.

In an update at 10 p.m. ET, United told USA TODAY that the "underlying technology issue" was resolved and that they were working to restore normal operations. The Chicago-based airline added that it was anticipating residual delays and working to get customers to their destinations.

"Due to a technology issue, we are holding United mainline flights at their departure airports," United Airlines said in an earlier statement. "Safety is our top priority."

Transportation Secretary Sean Duffy said he was briefed on United Airlines’ "internal tech outage" and noted that the FAA was in contact with the company’

See Full Page