Original sentence: Around 25,000 Serb refugees and displaced persons currently live in the municipality.This was caused by the ethnic cleansing of mostly Muslims and Croats by Serb authorities, and by a huge influx of Serb refugees from cleansed areas under Muslim and Croat control
Edited sentence: At the moment around 25,000 Serb refugees and displaced persons live in the municipality.This was caused by the ethnic cleansing of non-Serb (Muslim and Croat) population by the Serb authorities, and by a huge influx of Serb refugees from ethnic cleansing areas under Muslim and Croat control