2 U.S. troops killed in Koran backlash

Security guards stand as black smoke rises from tyres which were burnt by protesters during an anti-US demonstration in Kabul, Afghanistan, Wednesday, Feb. 22, 2012. Anti-American demonstrations erupted on the outskirts of Kabul for a second day Wednesday and in another Afghan city over an incident that the U.S. said was inadvertent burning of Muslim holy books at a military base in Afghanistan. (AP Photo/Ahmad Jamshid)

Two U.S. troops have been shot to death and four more wounded by an Afghan solider who turned his gun on his allies in apparent anger over the burning of Korans at a U.S. military base in Afghanistan, an Afghan official tells CBS News.

A statement from the International Security Assistance Force – Afghanistan, the international coalition in the country, confirmed that two troops were killed in Eastern Afghanistan on Thursday by “an individual wearing an Afghan National Army uniform.”

ISAF does not typically give the nationality of casualties until family members have been notified, but the CBS News source in the Afghan government said those killed and injured in the attack in the eastern Ningarhar province, along the border with Pakistan, were Americans.

Full story: 2 U.S. troops killed in Koran backlash