*****REUTERS CANNOT INDEPENDENTLY VERIFY VIDEO POSTED TO A SOCIAL MEDIA WEBSITE*****<br/> <br />With their stronghold of Raqqa under attack by U.S. forces, Islamic State militants are advancing on the Kurdish border town of Kobani.<br/> <br />Video uploaded to a social media website illustrates the apparent ferocity of the onslaught.<br/> <br />The militants are determined to erase all signs of the Syrian Kurds who live here, removing images of their leaders and triggering a mass exodus of terrified residents across the border into Turkey.<br/> <br />SOUNDBITE: Syrian Kurdish Refugee, Ali Abdurrahaman Saying (Kurdish):<br/> <br />"The Islamic militants are attacking us. There is a war out there. They are advancing so we had to flee. Our children are devastated. They are starving."<br/> <br />More than 140,000 Syrians have crossed into Turkey since IS militants launched their offensive on Kobani last week, causing a refugee crisis that Turkish officials fear will only get worse.
