Five thousand people a month are dying in the war in Syria according to the UN.
"The extremely high rate of killings nowadays -- approximately 5,000 a month -- demonstrates the drastic deterioration of the conflict," UN assistant secretary general for human rights Ivan Simonovic told a council meeting.
Officials say it is now the worst refugee crisis since the 1994 Rwandan genocide.
More than two million Rwandans fled the 1994 genocide, in which radical Hutus killed some 800,000 Tutsis and moderate Hutus in a period of about three months.
An average of 6,000 people leave the country every day.
A number of top UN officials are now calling on the divided UN Security Council to take stronger action to deal with the fallout from the two-year-old conflict which has claimed 100,000 lives.
