°®Âþµº

Theon Sunday called on the warring parties in Ethiopia's conflict to "recommit" to peace talks, as violence intensifies in the embattled region.

The city of Shire in northwest Tigray has been bombarded for several days in a joint offensive by , with civilian casualties reported in the push against rebels from the war-torn region.

The International Rescue Committee, an aid organisation delivering relief to stricken Tigray, announced on Saturday that one of its staff was among three civilians killed in an attack in Shire.

UN chief has joined the United States and other Western powers in expressing grave concern over the worsening violence and its impact on civilians, and called on both sides to negotiate peace.

Prime Minister Abiy Ahmed's government, and the Tigrayan authorities, have accepted an AU invitation to talk, but negotiations scheduled to start last weekend in failed to take place.

AU Commission chair Moussa Faki Mahamat said the escalating violence was of "grave concern".

"The Chairperson urges the Parties to recommit to dialogue as per their agreement to direct talks to be convened in South Africa by a high-level team led by the AU High Representative for the Horn of Africa, and supported by the international community," he said in a statement issued on Sunday, but dated on Saturday.

Talks were to be mediated by the bloc's Horn of Africa envoy Olusegun Obasanjo, South Africa's former deputy president Phumzile Mlambo-Ngcuka and former Kenyan president Uhuru Kenyatta.

Diplomats suggested logistical issues were partly to blame for the much-anticipated meeting not going ahead.

The latest fighting came as US special envoy Mike Hammer arrived in Addis Ababa to push for an end to nearly two years of war between Ethiopia, its allies, and rebels led by the

Fighting resumed in August after a five-month lull, dimming hopes of settling a conflict that has killed untold numbers of civilians, and been marked by atrocities by all sides.

The return to war also halted desperately-needed aid into Tigray, where the UN says millions of people have been forced from their homes, and hundreds of thousands are close to famine.

The conflict erupted in November 2020 when - sent troops to topple the TPLF, the ruling party in Tigray he accused of staging attacks on army camps.

The TPLF dominated Ethiopia's ruling coalition for decades before Abiy came to power in 2018.