Portugal has laid the blame for a massive power blackout on Spain after cuts sparked chaos across the Iberian Peninsula. One of Europe’s severest blackouts grounded flights, paralysed public transport,

That conclusion has been supported by the operator of Spain’s national grid, Red Eléctrica, which has located where outages began on Monday. Two separate incidents of power outages led to instability in the grid leading to a “breakdown in interconnections with France,” leaving the Iberian grid isolated.