Updated

A Dallas newspaper reports that the FBI is investigating a "stolen" handwritten condolence note by Jacqueline Kennedy to Ethel Kennedy that was penned shortly after Robert F. Kennedy's 1968 assassination.

The Dallas Morning News reported Sunday that investigators and Kennedy family members suspect the note was taken from Robert and Ethel Kennedy's Virginia home.

The note has changed hands several times and has sold for as much as $25,000.

The two-page note made its way to a Dallas auction house in 2006. One of Robert Kennedy's sons told the FBI that his family had never given nor sold the note. The FBI used a search warrant to seize it Aug. 27 from Heritage Auction Galleries.

An FBI spokesman says the note is considered "a stolen good" and part of a criminal investigation.