The attack last month comes as tensions between Ansar Dine, a Tuareg al Qaeda group, and several Tuareg separatist groups in northern Mali have escalated.
The attacks on the Tuareg National Movement for the Liberation of Azawad are likely an attempt to destabilize the movement and the region after several other Tuareg separatist movements signed a peace deal with the Malian government earlier this year.
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