Lieutenant Colonel Mohammed Suleiman said Kambar, believed to have links to al-Qaeda's north African branch and Nigerian Islamist extremist group Boko Haram, was killed on March 18, 2012.
That would have been before the United States listed him and two other Nigerian Islamists, Boko Haram leader Abubakar Shekau and Khalid al-Barnawi, as "global terrorists" in June of last year.