A military official said they were the same type of rockets used by the Movement for Oneness and Jihad in West Africa, the al-Qaida-inspired group that controlled the city last year and imposed harsh Shariah rule.
The region was already on edge following the Nov. 2 slaying of two journalists from Radio France Internationale who were reporting in the northern city of Kidal.
The lead suspect in that attack has previous ties to al-Qaida in the Islamic Maghreb.
On Friday, a French military adviser was fired upon by a gunman waiting outside his house in a rare attack on foreigners in Mali's capital, Bamako.
