NEW : Dam is in the hands of Kurdish forces , not Syria , an official says . There has been fierce fighting in the Kurdish town of Sinjar , close to the Islamic State , a source says . Iraqi fighters are engaged in house-to-house battle with ISIS , source says . Meanwhile , the head of the Kurdistan Regional Government , Massoud Barzani , told a group of Yezidi sect leaders that his government would liberate Sinjar , according to a report on the government 's website . Sinjar fell to ISIS fighters over weekend , police say .
NEW : Dam is in the hands of Kurdish forces , not Syria , an official says . There has been fierce fighting in the Kurdish town of Sinjar , close to the Islamic State , a source says . Iraqi fighters are engaged in house-to-house battle with ISIS , source says . Sinjar fell to ISIS fighters over weekend , police say .