The crisis in Ethiopia is a "stain on our conscience," the United Nations humanitarian chief said, as children and others starve to death in the Tigray region under what the U.N. has called a de facto government blockade of food, medical supplies and fuel.

In an interview with The Associated Press on Tuesday, Martin Griffiths issued one of the most sharply worded criticisms yet of the world's worst hunger crisis in a decade after nearly a year of war. Memories of the 1980s famine in Ethiopia, which killed some 1 million people and whose images shocked the world, are vivid in his mind, "and we fervently hope is not happening at present," he said.

"That's what keeps people awake at night," Griffiths said, "is worrying about whether that's what is in prospect, and in prospect soon."

He described a landscape of deprivation inside Tigray, where the malnutrition rate is now over 22% - "roughly the same as we saw in Somalia in 2011 at the start of the Somali famine," which killed more than a quarter-million people.

The war in Ethiopia began last November on the brink of harvest in Tigray, and the U.N. has said at least half of the coming harvest will fail. Witnesses have said Ethiopian and allied forces destroyed or looted food sources.

Meanwhile just 10% of needed humanitarian supplies have been reaching Tigray in recent weeks, Griffiths said.

"So people have been eating roots and flowers and plants instead of a normal steady meal," he said.

"The lack of food will mean that people will start to die."

Last week the AP, citing witness accounts and internal documents, reported the first starvation deaths since Ethiopia's government imposed the blockade on the region of 6 million people in an attempt to keep support from reaching Tigray forces.

But the problem is not hunger alone.

The U.N. humanitarian chief, who recently visited Tigray, cited the lack of medical supplies and noted that vulnerable children and pregnant or lactating mothers are often the first to die of disease. Some 200,000 children throughout the region have missed vaccinations since the war began.

And the lack of fuel - "pretty well down to zero now," Griffiths said - means the U.N. and other humanitarian groups are finding it all but impossible to reach people throughout Tigray or even to know the true scale of need.

Phone, internet and banking services have also been cut off, effectively hiding the crisis from the world. The Mekele University community in the regional capital warned in a letter to the U.N., European Union and others that Tigray "is experiencing a man-made form of famine that belittles the 1984 famine in its severity."

In the letter, shared Wednesday by the Tigray Communication Affairs Bureau, the community called for urgent intervention.

Billene Seyoum, the spokeswoman for Ethiopia's Nobel Peace Prize-winning Prime Minister Abiy Ahmed, did not respond to questions. The government has blamed problems with humanitarian aid delivery on the Tigray forces, who long dominated the national government before Abiy sidelined them. Abiy's government also has alarmed U.N. officials and others by accusing humanitarian workers of supporting the Tigray fighters.

Griffiths called such allegations unacceptable and unfair. He said he has told the government to share any evidence of misconduct by humanitarian workers so the U.N. can investigate, but "so far as I'm aware, we haven't had such cases put to us."

Humanitarian workers boarding flights to Tigray are told not to bring items including multivitamins, can openers and medicines, even personal ones. The U.N. humanitarian chief said he too was searched when he visited Tigray, with authorities examining everything in his bag and even questioning why he was carrying earphones.

Ethiopia's crisis has led the U.N., the United States and others to urge the warring sides to stop the fighting and take steps toward peace, but Griffiths warned that "the war doesn't look as if it's finishing any time soon."

On the contrary, in recent weeks it spread into the neighboring Amhara region. Griffiths said the active battle lines are making it challenging to get aid to hundreds of thousands more people.

Ethiopia will see the formation of a new government next week with another five years in office for the prime minister. Griffiths, who said he last spoke with Abiy three or four weeks ago, expressed hope for a change of direction.

"We'd all like to see is with that election inauguration, that we would see new leadership leading Ethiopia away from the abyss that it's peering into at the moment, that the national dialogue process which he discussed with me in the past, and his deputy discussed with me last week, that needs to happen," Griffiths said.

"It needs to be coherent, it needs to be inclusive and it needs to be soon."

From The Associated Press