UN leaders on Thursday alleged possible crimes against humanity in Ethiopia's Tigray region including by Eritrean troops, as they urged a pullout by the neighboring country, which denies involvement.

The United Nations also warned of potentially catastrophic hunger as it pleaded for urgent humanitarian access, although divisions at the Security Council stopped the international community from showing a common front.

A week after Amnesty International said that Eritrean troops massacred hundreds of people, the UN rights chief, Michelle Bachelet, joined calls for an investigation.

Her office said it had corroborated information about incidents including indiscriminate shelling in the regional capital of Mekele and towns of Humera and Adigrat in November when Ethiopia launched an offensive.

It had also verified "reports of grave human rights violations and abuses including mass killings in Axum, and in Dengelat in central Tigray by Eritrean armed forces."

Beyenesh Tekleyohannes cries in her home as a group of relatives look on in the village of Dengolat, north of Mekele, the capital of Tigray, in February 2021
Beyenesh Tekleyohannes cries in her home as a group of relatives look on in the village of Dengolat, north of Mekele, the capital of Tigray, in February 2021 AFP / EDUARDO SOTERAS

A preliminary analysis of the information indicated that "serious violations of international law, possibly amounting to war crimes and crimes against humanity, may have been committed by multiple actors in the conflict," it said in a statement.

"Without prompt, impartial and transparent investigations and holding those responsible accountable, I fear violations will continue to be committed with impunity, and the situation will remain volatile for a long time to come," she said.

The UN High Commissioner for Human Rights office also lamented what it said were continuing abuses including sexual violence and extrajudicial killings.

Prime Minister Abiy Ahmed ordered the offensive after accusing the local ruling party, the Tigray People's Liberation Front, of attacking federal army camps.

Abiy -- who won the Nobel Peace Prize in 2019 -- declared victory after pro-government troops took Mekele in late November, although the TPLF vowed to fight on, and clashes have persisted in the region.

Women gather to mourn the victims of a massacre allegedly perpetrated by Eritrean soldiers in the village of Dengolat, north of Mekele, the capital of Tigray, on February 26, 2021
Women gather to mourn the victims of a massacre allegedly perpetrated by Eritrean soldiers in the village of Dengolat, north of Mekele, the capital of Tigray, on February 26, 2021 AFP / EDUARDO SOTERAS

The United Nations for the first time also publicly pointed the blame at Eritrea, Ethiopia's onetime rival that has found shared objectives in Tigray. Both the Addis Ababa and Asmara governments have denied the Eritrean presence.

"It is now abundantly clear to all, and openly acknowledged by officials of the government administration in Tigray, that Eritrean defense forces are operating throughout Tigray," the UN under-secretary-general for humanitarian affairs, Mark Lowcock, told a Security Council session on the crisis.

"Countless well-corroborated reports suggest their culpability for atrocities," he told the closed-door, virtual session in remarks seen by AFP.

"Eritrean defense forces must leave Ethiopia, and they must not be enabled or permitted to continue their campaign of destruction before they do so."

The new US ambassador to the United Nations, Linda Thomas-Greenfield, has urged Ethiopia to end the humanitarian crisis in the Tigray region
The new US ambassador to the United Nations, Linda Thomas-Greenfield, has urged Ethiopia to end the humanitarian crisis in the Tigray region AFP / TIMOTHY A. CLARY

Lowcock called for assistance to be scaled up "dramatically" as he warned of the potential for "catastrophic" hunger in Tigray, with 4.5 million people in need of assistance.

Despite a UN agreement with Ethiopia, humanitarian access in Tigray remains minimal with the United Nations saying that hundreds of thousands of people in rural parts of the region have not been reached.

Ethiopian authorities "provide regular updates on what they're doing on the humanitarian front but then it's, 'look here, there's nothing to see,'" one diplomat said on condition of anonymity.

The Security Council session called by Ireland failed to reach consensus on a joint statement, with diplomats saying that Russia was the principal opponent.

Russia and fellow veto-wielding permanent member China saw the move as interference in internal affairs while non-permanent member India, although supportive of some statement, believed it should have been narrowly focused on the humanitarian situation, diplomats said.

A draft statement seen by AFP would have called for immediate humanitarian assistance as well as a halt to hostilities while asserting the importance for Ethiopia's sovereignty and territorial integrity.

The new US ambassador to the United Nations, Linda Thomas-Greenfield, said that the crisis "poses a direct threat to regional peace and security."

"We need to address it immediately," she said. "The onus to prevent further atrocities and human suffering falls squarely on the Ethiopian government's shoulders."

In one shift, diplomats said that the three African nations on the Security Council -- Kenya, Niger and Tunisia -- had supported the statement.

The three African nations had been reluctant at a previous session a month ago, saying that the African Union should take the lead.

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