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. One of Europe’s most severe blackouts grounded flights, paralyzed train systems, disrupted mobile communications and shut down ATMs across the Iberian Peninsula on Monday.

Life in Spain and Portugal began to return to normal Tuesday, a day after a massive power outage paralyzed the Iberian Peninsula, leaving governments, companies and experts scrambling to figure out what went wrong.

Electricity is pulsing through Spain and Portugal again after a massive outage knocked out power in both countries on Monday. So too are questions.

Jacob Fearnley was forced off court after play was suspended at the Madrid Open due to the widespread power outage affecting Spain and Portugal.

Britain’s Jacob Fearnley was forced off court as play was suspended at the Madrid Open due to a power outage. The third-round tie between Fearnley and Grigor Dimitrov had reached a critical stage, Fearnley breaking the 15th seed’s serve to stay in the match,

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