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Amnesty International USA says Yahoo's apology during a congressional hearing on the arrest of a Chinese journalist is insufficient. The human rights group's advocacy director for Asia Kumar released a statement Tuesday calling on chief executive Jerry Yang to explain how the Internet company will prevent future cases from occurring.

Earlier, members of the House Foreign Affairs Committee criticized Yang and Yahoo vice president Michael Callahan for withholding information about a Chinese investigation that led to the detention of journalist Shi Tao. A Chinese court used information provided by Yahoo to sentence Shi to 10 years in prison for sharing state secrets.

The Yahoo executives defended their company's actions, claiming they were not aware of the nature of the Chinese government's request for information about the journalist.

Committee Chairman (and Democrat) Tom Lantos said he does not believe America's brightest companies should be playing integral roles in what he called China's brutal political repression. (do not have to render this paragraph)