WASHINGTON (AP) — Families of several U.S. and British people held in Iran expressed fear for their loved ones Tuesday amid the deadliest unrest in decades in the Islamic republic.

The relatives spoke at a news conference in Washington to demand the release of spouses and parents held in Iran — in at least one case for more than a decade. Among those who spoke was a daughter of Robert Levinson, the former FBI agent who disappeared in Iran in 2007.

DUBAI, United Arab Emirates (AP) — Iran on Sunday said an open Revolutionary Court case involving an ex-FBI agent who disappeared there in 2007 on an unauthorized CIA mission "was a missing person" filing, not a sign that the man was being prosecuted.

DUBAI, United Arab Emirates (AP) — Iran is acknowledging for the first time it has an open case before its Revolutionary Court over the 2007 disappearance of a former FBI agent on an unauthorized CIA mission to the country, renewing questions over what happened to him.

In a filing to the United Nations, Iran said the case over Robert Levinson was "on going," without elaborating.

DUBAI, United Arab Emirates (AP) — Some key dates in the disappearance of Robert Levinson, a former FBI agent who vanished while in Iran on an unauthorized CIA mission:

March 9, 2007 — Levinson is detained by suspected Iranian security agents in the lobby of his hotel on Kish Island, Iran, a Persian Gulf resort area and free-trade zone for which no Iranian visa is required.