Gunfire wounded at least 26 people during fresh protests in several cities across Afghanistan over the burning of copies of the Koran, Islam's holy book, at NATO's main base in Afghanistan.
The American Embassy said its staff were in lockdown and all travel had been suspended as thousands of people expressed fury over the burning, a public relations disaster for U.S.-led NATO forces fighting Taliban militants ahead of the withdrawal of foreign combat troops by the end of 2014.
The U.S. government and the U.S. commander of NATO-led forces in Afghanistan apologised after Afghan labourers found charred copies of the Koran while collecting rubbish at the sprawling Bagram Airbase about an hour's drive north of Kabul.
Critics say Western troops often fail to grasp the country's religious and cultural sensitivities. Demonstrations by as many as 2,000 people broke out as word of the find spread.
There were two shooting episodes at protests which broke out in at least four areas of the capital.
Shots came from the direction of a foreign military vehicle parked outside a U.S. military base, said a Reuters witness. It is not clear who was doing the shooting. International Security Assistance Force (ISAF) officials were not immediately available for comment.
Later, wounded protesters along the Kabul-Jalalabad thoroughfare on the edge of Kabul said Afghan police had fired on them.
CHANTS OF DEATH TO AMERICA, DEATH TO KARZAI
Twenty-one people, including 11 policemen, were wounded in the capital, said Mohammad Zahir, head of Kabul police's crimes unit. The wounded included the city police chief, Ayoub Salangi, who was hit in the ankle by a stone.
Demonstrators had charged police lines and nearby military bases at a protest on the edge of Kabul, burning tyres and smashing vehicles and building windows.
Protesters shouted Death to America! and Death to (President Hamid) Karzai in a large demonstration on the outskirts of the Afghan capital.
When the Americans insult us to this degree, we will join the insurgents, said Ajmal, an 18-year-old protester in Kabul.
Demonstrators set fire to part of a housing compound used by foreign contract workers. A Reuters witness said the fire damaged part of a guesthouse at the Green Village complex, where 1,500 mostly foreign contractors live and work.
Outrage also spilled over in the Afghan parliament, where several members shouted death to America inside the legislative chamber.
Muslims consider the Koran the literal word of God and treat each book with deep reverence.
The protests spread to other cities. In Jalalabad in the east, demonstrators praised the leader of the Afghan Taliban, the secretive Mullah Mohammad Omar, screaming Long live Mullah Omar!, Reuters witnesses said. Five people were wounded, the governor's spokesman said.
Afghan media said demonstrations had also erupted in the province of Parwan, near the capital.
In Logar province, hundreds protested in front of the governor's office. Some threw stones. Separate protests were also under way in Jalalabad in the east.
Winning the hearts and minds of Afghans is critical to efforts to defeat the Taliban. Similar incidents in the past have caused deep divisions and resentment among Afghans toward the tens of thousands of foreign troops in Afghanistan.
Seven foreign UN workers were killed during protests that raged across Afghanistan for three days in April 2011 after a U.S. pastor burned a Koran in Florida.
(Reporting by Mirwais Harooni and Amie Ferris-Rotman; Writing by Rob Taylor; Editing by Michael Georgy and Nick Macfie)