Genetic analysis of the Hazara people indicates partial Mongolian ancestry. Invading Mongols and Turco-Mongols intermixed with the local Iranian population, forming a distinct group. Mongols settled in what is now Afghanistan and intermarried with native populations who spoke Persian. A second wave of mostly Chagatai Mongols came from Central Asia and were followed by other Mongolic groups, associated with the Ilkhanate and the Timurids, all of whom settled in Hazarajat and mixed with the local, mostly Persian-speaking population, forming a distinct group. One genetic study detected Sub-Saharan African lineages in both the paternal and maternal ancestry of Hazara. Among the Hazaras there are 7.5% of African mtDNA haplogroup L with 5.1% of African Y-DNA B. The origin and date of when these admixture occurred are unknown but was believed to have been during the slave trades in Afghanistan.