Several dozen relatives of Cécile Kohler and Jacques Paris, two Frenchmen detained in Iran, gathered Sunday at the foot of the Eiffel Tower in Paris. Two days after Tehran released two other Frenchmen, a "breath of hope" for the families of prisoners.

For months, the France has denounced these arbitrary detentions, speaking of "state hostages". Other European countries and human rights activists accuse Tehran of detaining dozens of foreigners in a blackmail strategy. The two French, Benjamin Brière and Bernard Phelan, returned to France after three years of detention for the first and more than seven months for the second.