Magnitude 7.5 earthquake strikes northern Japan; tsunami warning issued

A strong magnitude 7.5 earthquake has struck off northern Japan, prompting a tsunami warning for waves of up to 3 metres. The quake hit in waters off Iwate prefecture, shaking buildings in Tokyo and prompting authorities to warn of repeated tsunami waves. A crisis management team has been set up by the government to assess the impact of the earthquake, with officials still trying to confirm casualties or damage to property.