The other ethnic groups are the Mandingo (also known as Mandinka). They are descendants of traders from Guinea who migrated to Sierra Leone during the late nineteenth to mid-twentieth centuries. The Mandinka are predominantly found in the east and the northern part of the country. They predominate in the large towns, most notably Karina, in Bombali District in the north; Kabala and Falaba in Koinadugu District in the north; and Yengema, Kono District in the east of the country. Like the Fula, the Mandinka are virtually all Muslims at over 99℅. Sierra Leone's third president, Ahmad Tejan Kabbah, and Sierra Leone's first Vice-President, Sorie Ibrahim Koroma, were both ethnic Mandingo.