MADRID (Reuters) -Spanish grid operator Redeia will release its own report on the causes of the massive blackout that hit the Iberian peninsula on April 28, its chair, Beatriz Corredor, told a news briefing on Wednesday.

Spanish authorities say the massive power outage in April across Spain and Portugal was due to technical and planning errors that led to a cascade of failures in the grid.

Spain's power grid operator and the country's electricity companies traded blame on Wednesday over the April blackout that crippled the Iberian Peninsula, a day after a long-awaited government report highlighted their responsibility.