White House says classified systems not hacked

US officials insisted Tuesday that a cyber attack late last year did not compromise White House classified systems, but refused to confirm reports Russia was behind the breach. "There was an event last year," said deputy national security advisor Ben Rhodes. CNN earlier reported that Russia was behind the October attack that originated at the State Department, but was confirmed to have hit the White House too. National Security Council Spokesperson Mark Stroh told AFP the report was &q