Parvaz: Deported to Iran (Joshua Trujillo/AP)

Parvaz, 39, went missing after arriving in Damascus on April 29 to cover protests. Since Parvaz was born in Iran and also holds American and Canadian citizenship, it remains to be seen whether or not ties to her home country will expedite her release. (Follow Twitter chatter on Parvaz here.)

At least five other journalists have been detained in Syria and their whereabouts are unknown, according to the Committee to Protect Journalists.

Others missing

• Friends and family of missing journalists James Foley and Clare Gillis are still trying to mobilize support online. Since the two were detained in Libya on April 5, an online petition calling for their release has reached 34,000 signatures.Vigils everywhere from Chicago to the campus of Harvard University have been held for Gillis and Foley, and the two were allowed a visitor Wednesday.

• Efforts to raise awareness for Matthew VanDyke, a journalist missing in Libya since March 13, look similar, but less is known about his whereabouts. VanDyke, a freelance journalist, went missing near the city of Brega, but no official word has been given on whether or not he has been detained by Libyan forces.