Traffic queues in San Diego due to power outage
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Power blackout hits US and Mexico

More than two million people have been affected by an enormous power cut in southern California, Arizona and Mexico.

Power is steadily returning to two southwestern US states and Mexico, following a massive blackout which affected more than five million people.

Services to Arizona were restored early on Friday, while parts of California and the Mexican state Baja California have also since been reconnected.

Michael Niggli, president of San Diego Gas and Electric, earlier said both main connections of electricity into the city had been severed.