The United Nations continues to warn the conflict in Syria is fueling the worst refugee crisis since the Rwanda genocide. On Tuesday, U.N. High Commissioner for Refugees António Guterres said most of Syria’s 1.8 million refugees have fled since the beginning of the year.

António Guterres: “There are now nearly 1.8 million Syrian refugees known to UNHRC in the region. Two-thirds of them have fled Syria since the beginning of this year, an average of over 6,000 people a day. We have not seen a refugee outflow escalate at such a frightening rate since the Rwandan genocide almost 20 years ago. This crisis has been going on for much longer than anyone had feared, with unbearable humanitarian consequences.”

The official U.N. death toll for Syria’s more than two-year conflict is near 93,000.