also known as Sahrawis ), including Toubou , Nubians , Zaghawa , Kanuri , Hausa , Songhai , and Fula/Fulani ( French : Peul ; Fula : Ful"e ). Important cities located in the Sahara include Nouakchott , the capital of Mauritania ; Tamanrasset , Ouargla , Béchar , Hassi Messaoud