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."

"I have personally raised the issue, not only at the highest level that I have been involved with, but also through other intermediaries,"Kerry added.

"We don't have any meeting with anybody who has something to do with Iran or an approach to Iran where we don't talk to them about how we might be able to find not just Mr. Levinson, but we have two other Americans that we're deeply concerned about," Kerry said, referring to pastor Saeed Abedini and former Marine Amir Hekmati.

The Washington Post and the Associated Press first revealed details of Levinson's ties to the CIA last week.

MORE: Ex-FBI agent who disappeared in Iran was on rogue mission for CIA