Power is almost fully restored in Spain and Portugal a day after a major blackout. MADRID (AP) — The cause of Spain and Portugal's widespread blackouts remained a mystery on Tuesday, with some isolated disruption remaining after power was largely restored to both countries.

A widespread power outage hit Spain and Portugal, affecting millions of people who live across Europe's Iberian Peninsula.

Officials dismissed speculation about foul play, saying there was no sign that the outage was from a cyberattack.