David Shearer has told the UN Security Council that things are going from bad to worse in South Sudan.
Shearer, former leader of the Labour Party, left his role as MP in Mt Albert last year to take the role as the United Nation's head of mission in the war-torn country.
He is now in New York giving an update after three months on the job, and has told the Security Council things are deteriorating.
South Sudan separated from the rest of the country in 2011 but was now riven with ethnic violence.
He said appalling roads and the need to work through official and unofficial checkpoints throughout the country massively delayed the delivery of aid throughout the country, saying a 1000km journey could take two weeks.