By Ju-min Park SEOUL (Reuters) -North Korea fired an apparent intermediate-range missile off its east coast on Sunday, South Korea said, as tensions run high after Pyongyang’s recent launches of an intercontinental ballistic missile and its first military spy satellite. A projectile believed to be the missile has fallen, according to the Japanese coast guard, which said it could be a ballistic missile. It appeared to have fallen outside Japan’s exclusive economic zone, public broadcaster NHK said. In November, North Korea said it successfully tested new solid-fuel engines designed for intermed…