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.

Emergency services handed out food, water and blankets to stranded travellers at Madrid’s Atocha station on Monday evening, after a widespread blackout brought much of Spain and Portugal to a standstill.