The head of the Afghan opposition says his forces are poised to capture the airport in the strategic northern city of Mazar-e-sharif.
Northern Alliance President Burhanuddin Rabbani told reporters Saturday an attack could come at any time.
He said opposition soldiers have nearly surrounded the airport, near the Afghan border with Uzbekistan.
He also said opposition forces are ready to advance on Kabul -- the Afghan capital -- but said no decision to go ahead has been made.
The opposition is led chiefly by members of the former Afghanistan government, which the Taleban ousted in 1996.
The United Nations still recognizes President Rabbani as the country's legitimate leader.
U-S Defense Secretary Donald Rumsfeld has said the United States is helping arm and fund the Northern Alliance in its fight against the Taleban.