"We have a situation where a very large part of the population has been undernourished for 15 or 20 years"
World Food Program
Speaking to reporters in Beijing, Torben Due, the WFP's representative for North Korea, said aid contributions for North Korea had dried up after North Korea carried out a nuclear test in May.
The test drew international condemnation and a tightening of international sanctions against North Korea and Due said he believed donors were responding to the political situation in North Korea.
"It's a very sensitive area," he said, adding that he understood why donors were questioning where the aid was going.
'Needs of the people'
"But my angle is as a humanitarian. Being a humanitarian organisation you should look at the needs of the people. WFP does not engage in the political part of it."
|Food aid to North Korea has dried up following the May nuclear test [EPA]
The UN estimates that overall 8.7 million North Koreans depend on regular food aid.
The WFP had planned a relief operation to target 6.2 million, but with only a fraction of the contributions it needs it has had to scale that back to 2 million.
Compounding the difficulties, Due said the North Korean government has also ordered to the WFP to scale back its operations and to get rid of its Korean-speaking staff.
He said they were not given a reason by the North Korean government for the staff cut.
Starting from last month the agency has also been allowed to operate in only 57 counties in the country, rather than the previous 131 counties.
Due said that decades of shortages and international isolation had taken a heavy toll on North Korea's people.
"We have a situation where a very large part of the population has been undernourished for 15 or 20 years."
In some parts of North Korea, some women weigh just 45 kg when they give birth, he added, citing a medical survey.
"The children that survive these conditions will be born with compromised immune systems… and that will contribute to their stunting," Due said.
"It's a problem which goes from one generation to the next."