The number of Syrians who have fled their homes during the conflict has risen to 6.25 million, the largest refugee group of any country in the world, the UN refugee agency said Tuesday in Geneva, according to DPA. This means that nearly a third of the pre-war population of some 20 million Syrians has been displaced inside the country or has fled across the borders. The office of the UN High Commissioner for Refugees (UNHCR) said the refugee count abroad passed 2 million on Tuesday, an increase of 1.8 million over the course of the last 12 months. At the same time, 4.25 million Syrians had fled their homes to safer areas within the country as of late August. "Syria has become the great tragedy of this century - a disgraceful humanitarian calamity with suffering and displacement unparalleled in recent history," said UN High Commissioner Antonio Guterres.