Karzai said Kabul would be willing to consider giving immunity to U.S. troops who stay past 2014, but not until the U.S. guarantees respect for Afghanistan's sovereignty.
"But before I do that, I must make sure that the United States of America respects Afghan sovereignty, that it does not take prisoners in Afghanistan, that it does not keep prisons in Afghanistan in violation of the agreements with us, that it does not violate Afghan homes, (and) that there is no bombardment of Afghan villages and homes," he said.
In other developments, two civilians were killed when a roadside mine exploded Saturday in Bak district of eastern Khost province. The provincial governor's office said five other civilians and four Afghan soldiers were wounded in the mid-day blast that occurred during the soldiers' foot patrol.
Associated Press Writer Deb Riechmann and Patrick Quinn contributed to this report.