Retired-FBI agent Robert Levinson. (AP Photo/Levinson Family). Retired-FBI agent Robert Levinson. (AP Photo/Levinson Family).

Secretary of State John F. Kerry on Sunday said the United States has not abandoned Robert Levinson, the FBI agent who reportedly worked in Iran for CIA analysts and disappeared seven years ago.

"There hasn't been progress in the sense that we don't have him back, but to suggest that we abandoned him or anybody has abandoned him is simply incorrect and not helpful," Kerry said on ABC's "This Week."