Another 12 people were killed on Friday in Afghanistan during protests over the burning of copies of the Koran at a NATO military base. It was the fourth day of protests.
Most of the deaths reported on Friday were in western Herat province.
More than 24 people have been killed since the unrest began, including two US soldiers on Thursday.
NATO General John Allen has called for calm.
The BBC reports US personnel apparently put the Muslim holy books into a rubbish incinerator at Bagram air base, near Kabul.
Muslims consider the Koran the literal word of God and treat each book with deep reverence.
The books had been taken from Taliban prisoners, who were suspected of exchanging messages in them.