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12 die in Quran-burning protests in Afghanistan

Ahmad Masood / Reuters

An Afghan boy who works at a bakery watches a protest outside his window in Kabul on Feb. 24. Twelve people were killed on Friday in the bloodiest day yet in protests that have raged across Afghanistan over the desecration of copies of the Muslim holy book at a NATO military base with riot police and soldiers on high alert braced for more violence.

Parwiz / Reuters

Afghan men shout anti-U.S. slogans during a demonstration in Jalalabad province on Feb. 24.

Parwiz / Reuters

Angry afghans attacked U.S. bases after reports of Quran desecration.

KABUL, Afghanistan -- Twelve people were killed Friday during protests in Afghanistan over the burning of copies of the Quran at a NATO base, officials said, despite Thursday's written apology from Barack Obama.

Seven people were killed and 50 wounded in the western province of Herat, while two more were killed in Khost in the east. Three people were killed earlier during protests.

On Thursday, two U.S. soldiers were shot dead during a protest by a man wearing an Afghan government soldier's uniform, as a letter from Obama apologizing for the Quran burnings was delivered to Afghan president Hamid Karzai. Advertise | AdChoices

The U.S.-led military coalition in Afghanistan says the Qurans and other Islamic texts were sent to a burn pit by mistake.

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-- msnbc.com news services

Shah Marai / AFP - Getty Images

Afghan demonstrators shout anti-US slogans during a protest against Koran desecration in Kabul on Feb. 24.

Gunfire broke out in the capital of Afghanistan, where thousands of demonstrators protested against the U.S. for burning Qurans. NBC's Atia Abawi reports.