Berlin airport has said it is is experiencing delays to check-ins due to a "technical fault".
Over in Spain, an "incident" has been reported at all of the country's airports. "We are working to solve it as soon as possible. Meanwhile, operations are continuing with manual systems," the Spanish airport operator says.
also, "911 lines in Alaska, Arizona, Indiana, Minnesota, New Hampshire, and Ohio"
also, Sky News UK; Sky Sports News; ABC News in Australia; NDTV News in India
add Philippines and Japan to the list of affected