A lightning offensive by Sunni militants in recent weeks has overrun swaths of five Iraqi provinces, killed nearly 1,100 people and displaced hundreds of thousands.
"The funding is urgently needed to help one million people affected by the conflict, including in Mosul and Anbar," Stephane Dujarric, spokesman for UN Secretary General Ban Ki-moon, said Wednesday.
But he cautioned that the original $103 million appeal was "one of the least-funded appeals for 2014, with only six percent of the funding" received so far.
He said that among those who have fled their homes, some "are increasingly facing challenges in getting food, many of them dropping to one meal a day.
"The situation remains dire, our resources are overly stretched since the beginning of the year.
