The Uzbek president, Islam Karimov, has promised to keep the UN informed of unrest, but he denied he had discussed holding an independent inquiry into an alleged massacre of civilians.
The UN earlier said Mr Karimov had rejected requests for an international inquiry into the killing of a large number of demonstrators last week in the eastern city of Andijan.
International human rights organisations now estimate that up to 1,000 civilians may have died when the security forces opened fire on protestors.
The Uzbek authorities have said that 169 people were killed, many of whom they described as terrorists.
The UN's Human Rights Commissioner, Louise Arbour, said calls for an investigation had gone unheeded.
The US has cut back operations from its Uzbek air base since the clashes.
Washington has used the air base in Uzbekistan for support missions since the war against the Taliban in neighbouring Afghanistan.
