Kabul, October 16: According to local officials, troops stormed the house located in Wardak Province, shooting and killing the teacher and his daughters aged18 and 20.
Afghan authorities insist that US-led forces were mistakenly responding to a militant attack against a police post and that the victims had no ties to militants.
The deaths follow the killing of four Afghan civilians after US military forces attacked a residential area in Kunar Province.
Civilian casualties caused by NATO attacks have been a major source of tension between Afghan President Hamid Karzai and the US-led military alliance.
The loss of civilian lives at the hand of foreign forces has dramatically increased anti-American sentiments in Afghanistan.
According to a recent UN report on Afghanistan, civilian casualties, already at record levels in the first six months of the year, rose 5 percent between June and August 2011 compared with the same three-month period in 2010.
The US-led war in Afghanistan, with civilian and military casualties at record highs, has become the longest war in US history.
Insecurity continues to rise across Afghanistan despite the presence of nearly 150,000 Us-led forces in the war-ravaged country.
—Agencies