Bryan Denton for The New York Times
An Afghan soldier and resident of Maidan Wardak Province, which the government has decreed off limits to United States forces.
KABUL, Afghanistan — The Afghan government barred elite American forces from operating in a strategic province adjoining Kabul on Sunday, citing complaints that Afghans working for American Special Operations forces had tortured and killed villagers in the area.
The ban was scheduled to take effect in two weeks in the province, Maidan Wardak, which is seen as a crucial area in defending the capital against the Taliban. If enforced, it would effectively exclude the American military’s main source of offensive firepower from the area, which lies southwest of Kabul and is used by the Taliban as a staging ground for attacks on the city.
By announcing the ban, the government signaled its willingness to take a far harder line against abuses linked to foreign troops than it has in the past. The action also reflected a deep distrust of international forces that is now widespread in Afghanistan, and the view held by many Afghans, President Hamid Karzai among them, that the coalition shares responsibility with the Taliban for the violence that continues to afflict the country.
Coalition officials said they were talking to their Afghan counterparts to clarify the ban and the allegations that prompted it. They declined to comment further.
Afghan officials said the measure was taken as a last resort. They said they had tried for weeks to get the coalition to cooperate with an investigation into claims that innocent civilians had been killed, abducted or tortured by Afghans working for American Special Operations forces in Maidan Wardak. But the coalition was not responsive, the officials said.
The officials said that without information from the coalition, they could provide few specifics about who was accused or which units they were working with.
A statement from the presidential palace suggested that abuses may have been committed by American Special Operations troops, and not just by Afghans working alongside them. But in interviews after the announcement, Afghan officials indicated that the Afghans were the main suspects, and that the Americans were seen as enabling the abuses rather than perpetrating them.
Throughout the war, the United States military and the C.I.A. have organized and trained clandestine militias. A number still operate, and remain beyond the knowledge or control of the Afghan government. Aimal Faizi, the spokesman for Mr. Karzai, said it was time for foreign forces to hand over control of the “parallel structures,” as he called them, to the government.
Much of the work done by American Special Operations forces in Afghanistan or anywhere else is highly classified, and information about it is closely guarded. A senior American military officer, for instance, said he did not know whether such forces were based in Maidan Wardak or were based elsewhere and were flown in periodically for missions.
Afghan officials are, for the most part, told even less, and many in the Karzai administration no longer wish to allow Americans to continue “running roughshod all around our country,” said a person who is close to Mr. Karzai.
As additional evidence of that sentiment, the person close to Mr. Karzai, who asked not to be identified because he was discussing internal deliberations, cited an order issued earlier this month by Mr. Karzai sharply curtailing the circumstances in which Afghan forces could call in coalition airstrikes.
That order, however, simply brought Afghan forces into line with the rules that coalition troops have followed since last year. Neither Afghan nor foreign military commanders believe its impact will be far-reaching.
It will probably be harder to assess the effects of the ban decreed on Sunday, and the competing views on the matter illustrate just how far apart Afghan and coalition officials are when it comes to charting a course for the war.
With the withdrawal of American forces picking up pace, most of the coalition’s conventional forces in eastern Afghanistan, including in Maidan Wardak, have shifted into advisory roles. Among coalition troops, offensive operations are increasingly becoming the sole purview of the Special Operations forces.
United States officials, in fact, are planning to rely heavily on the elite troops to continue hunting members of Al Qaeda and other international militants in Afghanistan after the NATO mission here ends in 2014.
Afghans have expressed far less enthusiasm about foreign forces, either conventional or Special Operations troops, continuing to operate in Afghanistan for years to come. “The international forces, they are also factors in insecurity and instability — it’s not only the insurgency,” said Mr. Faizi, the presidential spokesman.
As for concerns that the new ban could reduce pressure on the Taliban, Mr. Faizi said that the Afghan Army and the police would “certainly be able to handle this work.”
