U.N. envoy Diego Cordovez, warning of "more political confusion, uncertainty and turmoil" in Afghanistan, called Saturday for a cease-fire and a caretaker administration prior to a tribal assembly that would decide on a new government in Kabul.

"The best way to facilitate the early establishment of a broad-based government would be for all segments of the Afghan nation to accept a cooling-off period," Cordovez told a news conference at the end of a shuttle mission to the region to review implementation of the Geneva accord on Afghanistan.

Cordovez, who has met with government leaders in Tehran, Islamabad and Kabul as well as Afghan refugees since arriving in the region late last month, negotiated the Geneva settlement, under which Moscow on May 15 began a scheduled nine-month withdrawal of its more than 100,000 troops from Afghanistan.