BEIJING (Reuters) - China and Japan engaged on Friday in a fresh round of invective over military movements near a disputed group of uninhabited islands, fuelling tensions that for months have bedevilled relations between the two major Asian powers. China's defence ministry rejected a Japanese allegation that a naval vessel had aimed a weapons-targeting radar at a Japanese military ship in the East China Sea, its first comment on the week-old incident. It said Japan's intrusive tracking of Chinese vessels was the "root cause" of the renewed tension. ...