Reports of the journalist’s apparent detention come amid heightened tensions between the United States and Iran, whose Supreme Leader Ayatollah Ali Khamenei on Saturday promised a “teeth-breaking” response to Israel and the United States after ...

"Iran routinely imprisons U.S. citizens and other countries' citizens unjustly for political purposes," the State Department said.

Rights groups said that Reza Valizadeh, an Iranian-American journalist, was recently arrested in Iran, although the State Department did not confirm that he was the person detained.