Queues build up as German airports hit by IT outage

The cause was not immediately known.

The outage caused queues of people waiting at border control at several German airports including Frankfurt, the country's busiest.

Berlin airport confirmed longer waiting times at immigration for non-Schengen passengers.

"We can confirm that since about 2pm today, there have been disruptions to border control for flights to and from the non-Schengen area," a spokesperson for Duesseldorf airport said, adding that passengers were being provided with water.

The regional public broadcaster WDR reported that passengers were waiting for two hours at immigration while others were being kept on the plane.