According to the United Nations, several hundred thousand people have died during the conflict since November 2020.
Mr Obasanjo said Ethiopia’s government and Tigrayan authorities had agreed on an “orderly, smooth and coordinated disarmament.”
The strike came two days after Tigrayan forces said they were ready for a ceasefire with the federal government.
“Ethiopians, Tigrayans, Amharas, Oromos, Afars have already suffered too much,” Mr Guterres lamented.
The government blames the Oromo Liberation Army (OLA), a banned splinter group of an opposition party, for the killings.
Mrs Bachelet said her office had received reports of 306 rapes by Tigrayan forces in the Amhara region in November and December 2021.
“Refugee settlements must always be protected in line with international legal obligations that apply to all who take up arms,” he said.
A month ago, rebellious Tigrayan forces captured the strategic towns of Dessie and Kombolcha, located on a key highway to the Ethiopian capital Addis Ababa.
The warning came a day after the U.S. issued a caution to its citizens residing in Ethiopia over possible terror attacks.
Tigray rebels are threatening to take over Addis by any means possible, including via violence.
