A
They said the helicopter came under attack near Latifiya, 40km (25 miles) south of the capital,
The
The
A major security operation in
However, the deaths of eight coalition soldiers were announced on Thursday - four British and four American - as well as of at least 10 Iraqi soldiers.
The Iraqis died when about 40 gunmen attacked a checkpoint north-west of the northern city of
The British soldiers were killed in a roadside bomb attack on the western edge of
A civilian interpreter was also killed - his nationality has not been confirmed.
And the
Pattern study?
At the site of the helicopter crash, witnesses described hearing weapons fire from the ground.
"I saw a helicopter in the sky, then I heard heavy gunfire," said one witness, quoted by Reuters news agency.
"I saw the helicopter move right and left before landing hard. It did not explode."
An unnamed Iraqi official said the militants were apparently using an anti-aircraft machine gun.
At least nine US helicopters have crashed or been brought down by attacks in
The attacks have raised fears that fighters may be studying flight patterns or may have acquired more advanced weapons.
Photo caption
US troops in Iraq/file photo