An electrical failure has paralysed much of the air traffic in and over Belgium and is set to cause delays, detours and cancellations of flights for several hours.

Clouds hang over the city of Brussels.

Clouds hang over the city of Brussels. Image by Mzximvs VdB / CC BY-SA 2.0

The Eurocontrol air traffic body said the electrical failure at the local centre will force planes to be grounded or detoured until 2pm local time.

The cause of the failure was not immediately clear.

(Press Association)