Al Qaeda in the Islamic Maghreb took credit for the weekend’s suicide attack in Timbuktu, stating on a Mauritanian website that the bomber was an Algerian from the Yusuf bin Tashfin brigade, formerly commanded by Abou Zeid. French and Malian forces, which are going door-to-door to root out remaining Islamist militants, have killed 11 militants in the city since the attack started on March 30.