RABAT--Al Qaida's North African wing has warned France it will avenge its fighters killed in a raid by French troops in the Sahara desert last month. In a statement posted online, Al Qaida in the Islamic Maghreb called French President Nicolas Sarkozy an "enemy of Allah". It urged tribes in the desert region straddling Mali, Niger, Mauritania and Algeria to join in the fight against "the sons and agents of Christian France". The group said it had executed the 78-year-old French hostage Michel Germaneau. Al Qaida has alleged that France launched the raid while negotiations were under way to release Germaneau.