Kabul, Afghanistan (CNN) -- A demonstrator died and several U.S. service members and Afghan police were injured as protests over the burning of Qurans at a U.S. military base turned violent Sunday, said officials. The bloodshed in northern Kunduz province came a day after a gunman killed two U.S. military officers inside their office in the highly secured Afghanistan Ministry of Interior -- one of several incidents targeting allied forces after reports emerged last week that NATO troops had burned Muslim holy books at Bagram Airfield. U.S. officials, including President Barack Obama, have apologized for the burning and called it inadvertent. A military official -- speaking on condition of anonymity, given the sensitivity of the issue -- said the materials were from a detainee center's library and had "inscriptions" that appeared to be used to "facilitate extremist communications."
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NEW: Top Afghan officials postpone a visit to Washington, a U.S. spokesman says
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1 dead, U.S. service members and police are wounded when a Sunday protest turns violent
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U.S., France pull their civilians from Afghan ministries after the ministry shooting
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30 have been killed, 200 hurt in unrest stirred by NATO members burning of Qurans
ISAF said that initial reports indicated "an individual" -- whom they did not name -- shot dead two NATO service members, later confirmed by an Afghan police official to be an @placeholder colonel and major.