“If the Americans once again do not honor their commitments and keep on disobeying, then this will be considered as an occupation, and they may expect to see a reaction to their action,” the statement said. It referred to American forces in Afghanistan as “infidels,” echoing language used by the Taliban.

Also on Saturday, 300 demonstrators from Wardak Province staged a noisy but peaceful demonstration calling for Mr. Karzai’s order to be obeyed. Some were apparently relatives of people who disappeared in raids by Afghans who work alongside the Americans in Wardak, and they carried photographs of nine people who had disappeared after one of the night operations.

“We want our missing men, dead or alive,” one young man screamed over a megaphone.

A joint investigation by the Afghan government and the American-led coalition was begun to determine the fate of those nine, but has offered no evidence yet about what happened.

Wardak Province is the western gateway to Kabul, but insurgents hold sway in many remote areas. There is little presence of regular American military units, so Special Operations troops, with Afghan special forces units, carry out the bulk of counterinsurgency efforts there.

Western officials have said the insurgents in the area where the disputed episodes took place were fighters with Hizb-i-Islami. The group long ago splintered into two factions, one of militant insurgents fighting the government, and the other a political party that supports it. The governor of Wardak Province, Abdul Majid Khogyani, who has lobbied intensively with President Karzai to win the pullout of American Special Operations forces from Wardak, is said to be close to that party.