Looking for His glorious appearing! Titus 2:13

Residents fleeing the frontier town of Ayn al-Arab, known in Kurdish as Kobani, and its surrounding villages said the militants were executing people of all ages in the areas they had seized to create a climate of fear and slavish obedience.

Kurdish politicians in Turkey renewed their appeal to young people in the country's mainly Kurdish southeast to head to Kobani to help their ethnic kin push back Islamic State, which has seized swathes of Iraq and Syria in recent months and proclaimed a caliphate in the heart of the Middle East.

"ISIL (Islamic State) are continuing to advance. Every place they pass through they kill, wound and kidnap people. Many people are missing and we believe they were kidnapped," Welat Avar, a doctor, told Reuters by telephone from Kobani.

"We now urgently need medicines and equipment for operations. We have many casualties ... ISIL killed many people in the villages. They cut off the heads of two people, I saw it with my own eyes," he said.

A Kurdish politician from Turkey who visited Kobani on Saturday gave a similar account of the Sunni militants' tactics.

"Rather than a war this is a genocide operation ... They are going into the villages and cutting off the heads of one or two people and showing them to the villagers," Ibrahim Binici, a deputy from Turkey's pro-Kurdish HDP party, told Reuters.

"It is truly a shameful situation for humanity," he said, calling for international intervention.