The US military has admitted killing seven civilians during a battle with Taliban in Afghanistan.

The deaths occurred during a firefight between a coalition patrol and up to 10 armed men in Kunar province near the border with Pakistan, the US said.

The clash erupted during a major operation launched by the US-led coalition against Taleban forces.

Fourteen Taleban fighters were reported to have been killed or injured in clashes on Saturday, and up to 41 the day before in a battle in Kandahar province.

There has also been fighting in the southern province of Zabul between Taleban and police manning a checkpoint. There are unconfirmed claims of dead and injured on both sides.

Investigation

US-led coalition forces say they have launched an investigation into the deaths of the civilians.

"We are investigating the incident and we will work jointly with the government of Afghanistan to determine the events that took place during this fight," coalition task force commander, Brigadier General David Fraser, said.

The civilian deaths happened in the Korengal Valley, when American troops responded to an attack by Taliban firing small arms and rocket-propelled grenades, said US military spokesman Major Matt Hackathorn.

Artillery and air support were called in.

PHOTO CAPTION

Afghans gather near coffins in Kandahar. (AFP)