Power has been restored to much of Argentina and Uruguay after a massive electrical failure left tens of millions of people in the dark.
Argentine President Mauricio Macri has promised a full investigation.
Argentine media said the power cut caused trains to be halted and failures with traffic signalling.
BBC reports the blackout was prompted by a failure in an electrical grid that serves both Argentina and Uruguay.
The outage occurred as people in Argentina were preparing to go to the polls for local elections, delaying voting in several regional provinces.
Parts of Paraguay and Chile were also affected.
[Source:BBC]
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