SEOUL (Reuters) – North Korea fired a ballistic missile towards the sea off the Korean Peninsula’s east coast on Sunday, South Korea’s military said. Japanese public broadcaster NHK said the North Korean-fired ballistic missile landed outside Japan’s exclusive economic zone (EEZ), citing unnamed government officials. The North’s missile launch comes just days after the country tested a high-thrust solid-fuel engine that experts said would allow quicker and more mobile launch of ballistic missiles, as it seeks to develop a new strategic weapon and speed up its nuclear and missile programmes. Th…