Iranian authorities have arrested and detained an American journalist who has reported for NPR, the BBC and Fox News.

Roxana Saberi, 31, has been working in Iran as a freelance journalist for six years and was arrested in Tehran almost a month ago. Her father said he has not heard from his daughter since then.

“Roxana called on February 10 to say that she had been arrested on January 31,” Reza Saberi told FOX News. “She did not say why she had been arrested or what for. She could not even say where she was when she was calling.”

Saberi’s press credentials were revoked by the Iranian government more than a year ago, but she was being allowed to file short stories until her arrest.

“She said that she had bought a bottle of wine and the person that sold it had reported it and then they came and arrested her,” he told NPR.

The Saberi family stayed quiet until now, in hopes she would be released.

Roxana — a former Miss North Dakota — grew up in Fargo and graduated from Concordia College. Her father was born in Iran and her mother grew up in Japan.