The Justice Department and the National Archives improperly assured the Sept. 11 commission that its members had access to all relevant materials about the Clinton administration's terrorism policies, without knowing if original, uncopied documents had been removed from the archives by former national security adviser Samuel R. "Sandy" Berger, a Republican congressional report said yesterday.

The report, issued by Rep. Thomas M. Davis III (R-Va.), accused both agencies of inadequately investigating the theft Berger admitted had occurred on two occasions in 2003. It quoted two Archives officials as saying that they had no way of knowing whether Berger took other documents from the files during two earlier visits.