Senator Dianne Feinstein said on the Senate floor that such activities "may have undermined the constitutional framework" of government oversight.
The Senate panel was investigating allegations of abuse during a CIA detention and interrogation programme.
A CIA internal watchdog has been tasked with looking into the alleged hacking.
"I am not taking it lightly," Ms Feinstein said of the matter on Tuesday, adding that the CIA may have violated federal laws in its alleged conduct. » | Tuesday, March 11, 2014
