The US troops in Iraq have shot dead a civilian who approached their patrol near the town of Miqdadiya, north of Baghdad, the military said.
One report quoting the military said it the man had a cast on his broken arm under his jacket, which troops had mistaken for an explosives vest.
He had ignored instructions to stop and a warning shot, the military said.
There have been a series of bomb attacks in the Muqdadiyah area, which the US has blamed on al-Qaeda in Iraq.
Iraqi police said the man was elderly, hard of hearing and suffering from mental disabilities, although the US military could not confirm this.
“There was nothing suspicious found on him but the incident is under investigation,” said military spokesman Maj Brad Leighton.
“It was a mistake… an unfortunate incident,” he added.
An American soldier makes a mistake and an innocent civilian dies. That’s a high price to pay for incompetence.
On one occasion, a house east of the Jabaliya refugee camp was struck – two children, a brother and sister, were killed.
Later, a 15-year-old girl and her 16-year-old sister were also killed.
In another attack, a mother was killed as she was preparing breakfast for her children, medical workers said.
“We are in the middle of a total war. We hear the rockets and the explosions everywhere… we cannot leave our homes,” a Jabaliya resident, Abu Alaa, told the AFP news agency.
“They’re shooting at everything that moves.”
Mother making breakfast for children; militant. Sisters (15 and 16 years old); militants. Children (brother and sister); militants.
An Israeli government minister warned yesterday that increasing rocket fire from Gaza would bring Palestinians a Shoah – the Hebrew word normally used to denote the Nazi Holocaust inflicted on Jews during the Second World War.
Mr Vilnai declared: “As the rocket fire grows, and the range increases – and they haven’t yet said the last word on this – they are bringing upon themselves a greater Shoah because we will use all our strength in every way we deem appropriate, whether in air strikes or on the ground.”
Israel’s project nears it’s final phase; the final solution of the Palestinian problem. And the rest of the world watches.