One US soldier and one Afghan protester were killed in a hand grenade attack during a Koran burning protest in northern Afghanistan on Sunday, officials said according to dpa. "Twenty thousand people took to the streets in Imam Saheb District in the northern province of Kunduz to protest against the burning of the Koran," Sayed Sarwar Hussaini, the provincial deputy police chief said. "The protesters tried to storm a military base of the international forces in the district". Some of the protesters were armed and threw hand grenades inside the base, resulting in the death of one US soldier and one Afghan protester," Hussaini said, adding six US soldiers were also injured. Fifteen Afghan policemen, including the district police chief, were injured, he said. The NATO-led coalition confirmed that an explosion had occurred in an ISAF installation in northern Afghanistan, but said there were no fatalities.