Bad weather has forced the postponement of a meeting between US Vice President Dick Cheney and Afghan President Hamid Karzai.
President Karzai's spokesman Khaleeq Ahmad said steady snowfall made the 50-kilometer helicopter trip from the U.S. military base at Bagram to Kabul too dangerous.
Officials from the vice president's office said the meeting will be rescheduled.
Cheney landed in Afghanistan on Monday on an unannounced visit after meeting in Pakistan with President Pervez Musharraf.
While in Pakistan, Cheney warned that Taleban insurgents are regrouping in remote areas of Pakistan for a new offensive in Afghanistan.
A Pakistani official said Cheney praised Pakistan's antiterrorism efforts, but urged General Musharraf to do more.
The official said Mr. Musharraf reiterated that Pakistan is doing all it can to secure its border and defeat insurgents.
"The New York Times" newspaper reported on Monday that the Bush administration is warning General Musharraf that the US Congress could cut aid to Pakistan unless it becomes more aggressive in hunting down terrorists.
The report said American intelligence officials believe the terrorist infrastructure is being rebuilt, and that Pakistani efforts to contain the insurgents have fallen short.