Paris - Following the release of Franco-Serbian Serge Lazarevic, held captive in north Africa since 24 November 2011, three European hostages remain in the sub-Saharan region.
A Swede, a Dutchman and a Briton who also holds a South African passport were kidnapped one day later in Timbuktu, northern Mali.
A fourth man from Germany was killed trying to resist his captors.
All of the kidnappings were claimed by Al-Qaeda in the Islamic Maghreb (AQIM), which released two photos to back up their claim.