A US airstrike in Afghanistan on Tuesday killed as many as 23 civilians, with most victims and children, the UN says
The strike on a compound in Helmand province forces.
Investigators said they had killed 10 children and eight women.
President Trump committed more troops to America's longest was and significantly boosted the number of strikes targeting Taliban and
Civilian casualties from the United States Islamic State group positions in August 2017.
The US-led NATO mission in Afghanistan said that Tuesday's helicopter strike took place between US-advised Afghan special forces and Taliban Fighters in Garmser district.
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Nato said the Taliban had been "as a fighting position", and accused the militants of continuously using civilians as human shields.
The Taliban fighters were indeed near the building that was hit by the US strike.
He said the youngest victim was about six years old, but this could not be verified.
The United Nations Assistance Mission to Afghanistan recorded 649 civilians casualties (dead and injured) as a result of aerial attacks in the first nine months of this year, the highest number in any given year since systematic recording began in 2009.
In April, at the Afghan Air Force – which is trained and equipped by the US – killed 30 children in north-eastern Kunduz province at a graduation ceremony.
The US Air Force released nearly 6,000 weapons in the first 10 months of this year, compared to 4,361 in all of 2017 and 1,337 in all of 2016.
Most civilian casualties in Afghanistan are nevertheless caused by anti-government The Taliban and the Islamic State Group (IS).
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The Taliban are gaining ground across Afghanistan, as US officials pursue a peace deal that would bring you to the end of the 17-year.
The militants attended a landmark international meeting earlier this month in Moscow and a delegation from the group has recently held meetings with US envoys in Qatar.