Widespread power outages were reported Monday in parts of Spain, Portugal and France, affecting critical infrastructure like airports and causing transportation disruptions.

“The interruption was due to a problem in the European electricity grid,” E-Redes, the national energy supplier of Portugal, said in a statement. In addition to Portugal, it said, “The blackout also affected regions of Spain and France, due to faults in very high voltage lines.”

E-Redes said that the outage was widespread across Spain, with outages in Catalonia, Andalusia, Aragon, Navarre, the Basque Country, Castile and León, Extremadura and Murcia.