WASHINGTON — Newly released government documents regarding John F. Kennedy's assassination say allegations that Lee Harvey Oswald was connected to the CIA were "totally unfounded."A 1975 CIA memo says a thorough search of agency records in and outside the United States was conducted to determine whether Oswald had been used by the agency or connected with it in "any conceivable way."The memo said the search came up empty. The memo also said there was also no indication that any other U.S. agency used Oswald as a source or for recruitment.The National Archives released another 676 government documents related to the assassination on Friday — the third public release so far this year. Under law, all the documents were to be disclosed to the public last week.Most of the latest release comprises 553 records from the CIA that previously were withheld in their entirety.