It is hard to determine how many ethnic Azeris currently reside in Turkey because ethnicity is a rather fluid concept in this country. and According to the Looklex Encyclopaedia, Azerbaijani people make up 800,000 of Turkey's population. Up to 300,000 of Azeris who reside in Turkey are citizens of Azerbaijan. In the Eastern Anatolia Region, Azeris are sometimes referred to as "acem" (see Ajam) or "tat". They currently are the largest ethnic group in the city of Iğdır and second largest ethnic group in Kars.