The Federal Aviation Administration issued a ground stop at LAX Sunday morning due to staffing issues.

The FAA issued a temporary ground stop at one of the world’s busiest airports soon after U.S. Transportation Secretary Sean Duffy predicted that travelers would see more flights delayed and canceled in the coming days as the nation’s air traffic controllers work without pay during the federal government shutdown.

The ground stop was lifted just after 10:30 a.m., but might continue to restrict traffic into LAX.