The 67 year-old teacher for her own Catholic ONG was kidnapped in the Central African Republic by Christian militiamen on Monday.
Philippe El Shennawy, 60, was found guilty of robbing a Paris bank and taking hostages in 1977, crimes he has always denied committing.
French president Francois Hollande announces the release of priest who was kidnapped in November in Cameroon, near Nigerian border.
Francis Collomp, 63, who was kidnapped on December 19, 2012, by the Ansaru Islamist group, reportedly escaped during a shoot-out.
Reporter Nadir Dendoune is free to leave Iraq after the authorities close case against him for allegedly illegally photographing military and police.
After reports from a French government minister that they had been rescued, the fate of a family of seven kidnapped in Cameroon remains unclear.
Florence Cassez, jailed in Mexico seven years ago for gang crime, has been freed after a long legal campaign claiming evidence was fabricated.