The father of Roxana Saberi says his daughter has been held in Iran since January 31, ostensibly for buying a bottle of wine, and that there had been no information about her for more than two weeks.
Saberi, a 31-year-old Iranian-American born in the United States, has reported for the BBC, National Public Radio, and other media.
Asked about the case, Iranian Foreign Ministry spokesman Hassan Qashqavi said her press card was withdrawn about two years ago.
"She should not have engaged in collecting news and information illegally," Qashqavi said.
Read more of the Reuters story here.