Travel disruption has hit thousands of passengers around the world, following a "system wide" computer bug at U.S. airline Delta.
On Twitter, the Delta told passengers: "Our systems are down everywhere."
Delays were reported at a string of airports, including in the US, the UK, Iceland and Japan.
The airline has said en route flights are unaffected, but passengers waiting to board should check their flight status while the issue is addressed.
"Delta experienced a computer outage that has impacted flights scheduled for this morning," it said in a statement.
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