Iraq claimed a similar "kill" last month
Iraq says it has shot down a US spy plane over the south of the country.
The official Iraqi News Agency (INA) said the plane was brought down near the port city of Basra.
"Iraqi anti-aircraft fire in the region of Basra on Tuesday brought down an American spy plane," INA reported.
The US military has not yet commented on the claim.
Western defence sources in Kuwait said a US might have lost contact with one of its Predator planes, Reuters news agency reported.
INA said the plane was shot down at 1130 local time (0730 GMT) and wreckage from the "highly advanced" plane was being collected.
The news agency quoted an unnamed Iraqi Air Defence Command official as saying: "The plane was coming from Kuwaiti territory and it was used to provide the American enemy with information concerning our installations, vital sites and our air-defence formations."
Second plane downed
If confirmed, it will be the second US spy plane downed in Iraq in the past two weeks.
Iraq said its forces shot down an unmanned Predator plane in the Basra area, 560 kilometres (350 miles) south of Baghdad on 27 August.
The US Defense Department acknowledged losing a plane at that time but did not confirm the circumstances.
The United States and Britain frequently fly sorties over no-fly zones over north and south Iraq, imposed after the Gulf War.
Iraq refuses to recognise the legitimacy of the
zones and has stepped up efforts to shoot
down allied planes over the past few months.
-- Anonymous, September 11, 2001