Barack Obama, the US Democratic presidential candidate, has denied that comments he made over refining his Iraq policy meant he had altered his position on withdrawing US troops.

Obama said on Thursday he would make a "thorough assessment" of the situation in Iraq during a forthcoming trip to the country.

The Illinois senator said he would consult US generals in the field and then continue to "refine" his policy.

Representatives for John McCain, the Republican presidential candidate, said the comments meant Obama had backtracked on his position.

Obama had pledged a phased withdrawal of US troops over a 16-month period if elected president in November's elections, while McCain has said he wants US troops to remain in the country until success is assured.

Priming the pump

Obama held a second news conference later on Thursday in the US state of North Dakota to clarify his comments, in which he said he saw no information that "contradicts" his plans for pulling out one or two brigades a month if elected.

He said that was "the same position" that he had held for the past year.

"My first day in office, I will bring the joint chiefs of staff in, and I will give them a new mission, and that is to end this war. Responsibly, deliberately, but decisively."

Obama also blamed McCain's camp for misrepresenting his words to the media, saying they had "primed the pump" with the press "to suggest that somehow we were changing our policy, when we hadn't".

HEYET Net- Agencies