A countrywide power outage impacted Spain—as well as swaths of Portugal and smaller portions of France—Monday afternoon, affecting essential services and wreaking chaos across the Iberian Peninsula. The cause of the outage is currently being investigated by Spanish and Portuguese officials and ministers.

It is rare to have such a widespread outage across the Iberian Peninsula, with a combined population of about 60 million people.

A major power outage has been reported in Spain and Portugal, including their capitals. Spanish generator RedElectrica said Monday the Iberian peninsula was affected, saying the incident is being assessed and responded to. The company said in a social media post that it was beginning to restore power in the north and south of the country.