Syrian relief work hampered by U.N. failings, aid groups say

BEIRUT (Reuters) - Aid organisations working in Syria say they are growing frustrated at how the United Nations is handling the world's biggest humanitarian crisis, accusing it of excluding them and withholding information vital to assist millions in need.

A letter obtained by Reuters which was sent to several U.N. Security Council members this month by international non-governmental organisations (NGOs) working in Syria says a lack of coordination by the United Nations means assistance is not reaching some civilians in priority areas.