CBS News has refused to confirm reports that presenter Katie Couric will be leaving once her contract is up on 4 June.
Ms Couric has been in the one of the most high-profile US news jobs for less than five years and, according to the source, is aiming to start her own daytime show, although her new venture has not yet found a network.
But yesterday CBS News spokeswoman Sonya McNair said: "We're having ongoing discussions with Katie Couric. We have no announcements to make at this time."Reuse content