Following the anti-Greek tensions in Bulgaria in 1906 and the Politis–Kalfov (1924) and Mollov–Kafantaris (1927) population exchange agreements after World War I, the bulk of the Greek-speaking population in Bulgaria was forced to leave for Greece and was substituted by Bulgarians from Western Thrace and Greek Macedonia. Among the few exceptions were some of the Sarakatsani, estimated at 4,107 in 2006 and a small group of Greek speakers with Bulgarian self-consciousness. This group, living in Suvorovo and two nearby villages, according to the Bulgarian ethnographer Anastas Angleov: "...They themselves used to say their Bulgarian-speaking neighbours: We are Bulgarians, but we speak Greek...".