There has been massive disruption at airports around the world

There has been massive disruption at airports around the world

Problems have begun in the USA, Spain and Germany, causing flight delays.

American Airlines, United Airlines and Delta Airlines have grounded all their planes due to a communication problem, the US Civil Aviation Administration said.

Airports in Spain have experienced a "computer system incident" that could lead to flight delays, operator Aena said.

Berlin Airport has reported possible check-in delays due to a technical glitch.