Declassified documents reveal a CIA program lacking sufficient oversight that includes data collected from U.S. citizens, a pair of senators said Thursday.

The unnamed program was one of two detailed in the CIA‘s Deep Dive I and Deep Dive II reports, which the Associated Press described as a “repository” of classified data. In a statement to the Washington Examiner, the CIA defended its actions in the face of criticism by Sens. Ron Wyden of Oregon and Martin Heinrich of New Mexico, two Democrats on the Intelligence Committee, who are raising concerns about civil liberties.