Ten United Nations staff were murdered - two by beheading - after extremists stormed their compound in northern Afghanistan today. Protesters broke into UN offices in the northern city of Mazar-i-Sharif after a demonstration against Koran burnings in the America turned violent. A small breakaway group attacked the UN compound, throwing stones and climbing on blast barriers to try to gain entry. They seized weapons from guards and opened fire before storming the site. An Afghan police source, who asked not to be named, said the chief of the mission in the city was wounded but survived. Among those murdered...