The State Department said Friday that all three presidential candidates' passport files were breached, CNN reported.

The admission comes after it was revealed Sen. Barack Obama's files had been viewed three times by contractors. One of the contractors also viewed the files of Republican Sen. John McCain, said State Department spokesman Sean McCormack.

Earlier Friday, Sen. Hillary Clinton's office said that the State Department had notified it that her file had been breached in 2007.

Secretary of State Condoleezza Rice said Friday she had apologized to Obama for the unauthorized viewing of his passport file by State Department contractors.

It was unknown Friday whether Rice had apologized to Clinton and McCain.

Two contractors were fired and a third was disciplined after they accessed Obama's file, McCormack said Thursday.

Rice told also said that the breaches would be investigated.

"I told him I was sorry and I told him that I myself would be very disturbed in anyone had looked at my passport files and that, therefore, I will stay on top of this," Rice said.

"We are going to do an investigation through the inspector general," she said. "None of us want us to have a situation where any American's passport file is accessed in an unauthorized way."

Rice said "it appears that the system worked" because the unauthorized viewing was flagged, but "it should have been known to senior management."

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