A nationwide power outage hit Spain and Portugal on Monday, leaving millions without electricity. Reports indicate issues with the European electric grid.

Spain and Portugal experienced a widespread power outage on Monday, leaving millions without electricity in a snap blackout.

In Portugal, official sources told domestic media that the outage, which hit around late morning local time, was nationwide, while similar reports emerged from Spain.

Madrid's Barajas International Airport and Lisbon's Humberto Delgado were closed after being left without power, and telecommunications have also been affected, with residents across the two countries saying they have no access to mobile networks.

Meanwhile, other airports have come to a standstill throughout the Iberian Peninsula, and flights from Brussels and other European cities to Spain and Portugal have been cancelled, leaving hundreds stranded, Euronews has learned.