Rescuers are searching for survivors and trying to restore power after a powerful earthquake hit the Japanese island of Hokkaido. At least seven people are known to have died after the magnitude 6.7 earthquake struck at 3.08am. The quake disabled power systems, leaving nearly three million households on the island without electricity and left in the dark. The island’s only nuclear power plant, which was offline, switched to a back-up generator to keep its spent fuel cool, and nuclear regulators said there was no sign of abnormal radiation. Read more: https://bit.ly/2NnSwrj • Subscribe to ITV News on YouTube: http://bit.ly/2lOHmNj • Get breaking news and more stories at http://www.itv.com/news Follow ITV News on Facebook: / itvnews Follow ITV News on Twitter: / itvnews Follow ITV News on Instagram: / itvnews