Serbian police have arrested a senior special police officer on suspicion of assassinating Serbian Prime Minister Zoran Djindjic. Mr Djindjic's successor as prime minister, Zoran Zivkovic, said the man was a deputy commander of the Unit for Special Operations (JSO), Zvezdan Jovanovic, aged 38. "Police have identified the person who, there are good grounds to suspect, fired at late Prime Minister Zoran Djindjic," he told a news conference. "He was arrested yesterday and has been detained for further investigation." Mr Djindjic was killed by a sniper's bullet outside government buildings in Belgrade on 12 March. Just hours after the killing,...