After an unprecedented power outage affected Spain, Portugal, and parts of southern France, misleading claims about its cause circulated online, including theories of a cyber attack and terrorism. Spanish Prime Minister Pedro Sánchez urged caution against misinformation. Investigations by Spain's grid operator and government officials ruled out a cyber attack, attributing the outage to a disconnection between electricity generation plants. False narratives, including accusations against Russia, were debunked, and calls for an independent investigation were made.