The Supreme Court declined Monday to hear terrorism suspect Zacarias Moussaoui’s appeal of a key ruling upholding the Bush administration’s power to bar certain witnesses sought by the only person charged in the United States in connection with the Sept. 11 attacks.

Justices let stand a lower court ruling that allowed the government to pursue the death penalty while restricting Moussaoui’s direct access to three al-Qaida terror captives. The lower court, citing national security concerns, said Moussaoui could use government-prepared summaries from the captives but not interview them himself.