In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani

Smoke rises from the Syrian town of Kobani, seen from near the Mursitpinar border crossing on the Turkish-Syrian border in the southeastern town of Suruc. Kurdish forces defending Kobani urged a U.S.-led coalition to escalate air strikes on Isis fighters who tightened their grip on the Syrian town at the border with Turkey. A group that monitors the Syrian civil war said the Kurdish forces faced inevitable defeat in Kobani if Turkey did not open its border to let through arms, something Ankara has appeared reluctant to do