Washington (Reuters)- Expressing "extreme anger" toward the U.S. government, Afghan President Hamid Karzai said in an interview with the Washington Post that the war in Afghanistan was not fought with his country's interests in mind.

"Afghans died in a war that's not ours,' Karzai said in the interview published on Sunday, just a month before an election to pick his successor.

He was quoted as saying he was certain the 12-year-old war, America's longest and launched after the attacks of September 11, 2001, was "for the U.S. security and for the Western interest."

Karzai's refusal to sign a security deal with Washington that would permit foreign troops to stay in Afghanistan beyond this year has frustrated the White House, and President Barack Obama has told the Pentagon to prepare for the possibility that no U.S. troops will be left in Afghanistan after 2014.

Obama told Karzai in a phone call on Tuesday he had given the order to the Pentagon. The phone call was the first substantive discussion between the two leaders since June.

But staking out a new position, the White House said in a statement it would leave open the possibility of concluding the bilateral security agreement later this year.

"It's good for them to sign it with my successor," Karzai told the Post. He has insisted the United States must jump-start peace talks with Taliban insurgents and end raids and strikes on Afghan homes before he signs the deal.