Some of the estimated 130 000 mostly Syrian Kurd refugees who have fled to Turkey are attempting to go back to fight the Islamic State militants who forced them to flee.
The situation has become increasingly desperate, prompting the UN refugee agency to call for more help for Turkey to cope with the displaced families.
The UNHCR says this is the largest influx of refugees since the start of the Syrian conflict in 2011.
ISIS militants are reported to be closing in on the Syrian town of Ayn al-Arabon also known as Kobani.
The fall of the town would give the Islamic State militants complete control of the area.
Turkey was already coping with around one million Syrian refugees before this latest influx. The UNHCR says the numbers involved would put a strain on any host country.
The fact that the latest arrivals are mostly Kurds is also a complicating factor, since Turkey fought a 30-year war against Kurd separatists that cost 40 000 lives.