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More civilians die in Afghanistan
Nine Afghan civilians have been killed in a bombing raid in Kapisa province, Afghan officials say.
US forces have confirmed carrying out an air strike in the area but say they have no accurate casualty information.
The news comes shortly after US forces were accused of killing 10 civilians during a shoot out on Sunday in Nangarhar province.
Journalists say US troops confiscated their photos and video footage of the aftermath of the violence.
The BBC's Alastair Leithead in Kabul says the international mission to Afghanistan is to help the government and the people. But heavy fighting and suicide attacks have led to the death of thousands of innocent people over the past year.
President Karzai has been critical of the international forces in the past, saying they should do more to prevent civilian casualties.
News of the air strike in Kapisa came first from the province's deputy governor, Sayed Daud Hashimi.
He said the nine dead civilians included five women and three children and that the raid was carried out by Nato forces. Nato have denied any involvement.
But US forces say they dropped two 2,000 lb bombs during an air strike in Kapisa after a US base had come under attack. A US spokesman said they had no information yet on any deaths.
The news came shortly after President Hamid Karzai had condemned an incident on Sunday in which US forces were accused of firing indiscriminately at civilians in the eastern province of Nangarhar.
The Americans say the Nangarhar fighting, near the city of Jalalabad, started when a convoy of marines was attacked by a suicide bomber and came under co-ordinated small-arms fire.