Three journalists, one of them foreign, were arrested at mass demonstrations in Tehran by a regime determined to suppress all independent sources of information inside Iran.

Farhad Poulaid, an Iranian working for the French wire service AFP, was detained Wednesday when he rode through central Tehran on a motorbike. Nothing has been heard from him since.

Nafiseh Zareh Kohan, an Iranian who writes for reformist publications, and Niels Krosgaard, 31, a Danish journalism student, were also held the same day, the International Federation of Journalists said Friday.

The arrests are part of a crackdown on all independent media, foreign and domestic, in the five months since President Ahmadinejad’s disputed re-election caused the most serious unrest in the Islamic Republic’s 30-year history.

The international press freedom organization Reporters Without Borders said: “At least a hundred journalists and cyberdissidents have been arrested since the election and 23 of them are still being held. More than 50 journalists have left the country and those who have stayed are subject to constant harassment.”

Click here for more from the Times of London.