From Sara Sidner, CNN
updated 9:09 AM EDT, Sun March 11, 2012
Kabul, Afghanistan (CNN) -- An American soldier left his base in Afghanistan and went from house to house in two villages, killing 16 people in their homes, a provincial official told CNN Sunday.
NATO's International Security Assistance Force confirmed that a soldier had gone off base and fired on civilians before turning himself in, but did not say how many victims there had been.
There has been confusion about the number of casualties since the shooting in Kandahar province, eastern Afghanistan, with different sources offering different numbers.
Regardless of the number of victims, the incident looks likely to inflame tensions still further between foreign troops and Afghan civilians, many of whom were enraged by the burning of Qurans by American troops last month.