WASHINGTON - The United States is said to be increasingly taking over the Afghanistan war with more troops and civilians in the strife-torn country this year. US President Barack Obama has called for an additional 17,000 U.S. troops in Afghanistan, bringing the number of foreign troops to nearly 90,000, nearly two-thirds of them Americans, The Washington Post said, citing administration officials. The number of US civilian officials will also grow by at least 50 percent, to more than 900 under the new Afghanistan-Pakistan strategy Obama is announcing on Friday Administration officials say US diplomats and development experts plan to spread into relatively peaceful western and northern regions of Afghanistan. That area was left to other NATO governments. New US resources and leadership will be expected to deal with critical issues such as counter-narcotics efforts and strengthening local government institutions. US policy in Pakistan, a major component of the new strategy, is largely unilateral, the Post noted. The European Union has an aid and trade relationship with the country, but few European governments outside of Britain have strong involvement there. In Afghanistan, the administration "will continue to characterize the effort as multinational. There will continue to be thousands of troops and people" from NATO and elsewhere, a defence expert said. "But the center of gravity is going to shift toward the Americans." According to the Post, Obama's national security team has taken pains to consult with allies as it has put the new strategy together. The Washington announcement, and the presentation Obama will make at an April 3-4 NATO summit in Europe, will emphasize shared threats and common purpose, officials said.