Power is gradually being restored in Lisbon after a massive blackout hit the Iberian peninsula stranding passengers in trains and hundreds of elevators while millions saw phone and internet coverage die. Barely a corner of the peninsula, which has a joint population of almost 60 million people, escaped. But no firm cause for the shutdown emerged though wild rumours spread on messaging networks about cyber attacks. Portuguese Prime Minister Luis Montenegro said the source of the outage was "probably in Spain". Spain's Prime Minister Pedro Sanchez said "all the potential causes" were being analysed and warned the public "not to speculate" because of the risk of "misinformation". IMAGES