C.I.A. Admits Penetrating Senate Intelligence Computers

An internal investigation by the Central Intelligence Agency has found that its officers improperly penetrated a computer network used by the Senate Intelligence Committee in preparing its report on the C.I.A.'s detention and interrogation program.

In a statement issued Thursday morning, a C.I.A. spokesman said that agency’s inspector general had concluded that C.I.A. officers had acted inappropriately by gaining access to the computers.

The statement said that John O. Brennan, the C.I.A. director, had apologized to the two senior members of the Senate Intelligence Committee and that he would set...