Fighting between U.S.-backed Syrian rebels and rival militants has killed more than 20 people in northern Syria over the past two days, opposition activists said Monday. The fighting between Islamic militants and the Democratic Forces of Syria, which is led by Kurds, has flared in recent days in the northern province of Aleppo. Most fighting has taken place in the border area, where Turkey is examining the possibility of creating a safe zone to protect civilians and moderate rebels fighting Syrian President Bashar Assad’s forces. Each side released the convicts and allowed them to return home before Chinese President Xi Jinping and Taiwanese President Ma Ying-jeou met Nov.