The Iranian government continued to crack down on foreign media in the country on Sunday, expelling and detaining some journalists, including a Canadian.
Newsweek said Canadian journalist and documentary filmmaker Maziar Bahari, who is the U.S. magazine's correspondent in Iran, was detained in Tehran on Sunday "without charge by Iranian authorities."
Bahari has been living and covering the country for the past decade, said Newsweek, which described his coverage as fair and has called on the government to release him immediately.
Newsweek also asked governments of the world to "use whatever influence they have with the government in Tehran to make clear that this detention is unwarranted and unacceptable, and to demand Mr. Bahari's release."
Bahari is one of at least 24 journalists and bloggers known to have been arrested in Iran since protests began there more than a week ago when Iranians began protesting the official results of the presidential election.
He was born in Tehran and has a degree in communications from Montreal's Concordia University, according to online profiles.
The British Broadcasting Corp. said its Tehran-based correspondent, Jon Leyne, was asked to leave the country.
LIFE magazine also reported the arrest of the photojournalist who took an iconic photo of a young woman in a headscarf making a victory gesture as white smoke roiled in the background.