GHAZNI, Afghanistan — A purported Taliban spokesman today said a meeting between Afghan President Hamid Karzai and President Bush had "no result" and that militants' demands must be met if 21 South Korean hostages are to be safely released.

The spokesman, Qari Yousef Ahmadi, said Bush and Karzai must accept Taliban demands that militant prisoners be released in exchange for the lives of South Koreans or there will be a "bad result."

The militants kidnapped 23 Korean aid workers traveling by bus from Kabul to Kandahar on July 19. Two male hostages have been executed.

Ahmadi said the Taliban's demands remain the same. "Bush and Karzai have to accept the Taliban conditions otherwise they will see a very bad result for Korean hostages," Ahmadi said.

Bush and Karzai ruled out making any concessions to the Taliban militants.

In South Korea, relatives of the hostages expressed disappointment that the presidential summit failed to produce concrete measures to bring the captives home.

South Korean Foreign Minister Song Min-soon said the results of the summit were anticipated and cautioned that the country should be prepared for a protracted standoff.