Sudan's army has denied it carried out a deadly attack on a major hospital on Friday night in a city in the west of the country held by its rivals, the paramilitary Rapid Support Forces (RSF).
The head of the World Health Organization (WHO) said 64 people - including 13 children, two nurses and a doctor - had died in the strike on el-Daein Teaching Hospital and 89 others had been wounded.
Enough blood has been spilled, Tedros Adhanom Ghebreyesus posted on X, urging the warring parties to end the conflict, which started nearly three years ago.
The RSF said an army drone had hit the hospital in el-Daein, the capital of East Darfur state, on the day Muslims were marking the festival of Eid.
Sudan was plunged into a civil war in April 2023 when a vicious struggle for power broke out between the military and the RSF, who had once been allies after coming to power in a coup in 2021.
More than 150,000 people have since died in the conflict and about 12 million have fled their homes - nearly a third of the country's population - in what the United Nations has called the world's largest humanitarian crisis.
Dr Tedros, who said el-Daein Teaching Hospital was no longer able to function following Friday night's attack, condemned the frequent targeting of medical facilities.
Over the nearly three-year conflict, WHO has confirmed that 2,036 people have been killed in 213 attacks on health care, including Friday night's strike, he said in his tweet.
In a statement, the RSF said the strike had completely destroyed the hospital's top floor, caused extensive damage to the accident and emergency department and destroyed vital medical equipment.
The Emergency Lawyers group has called for an independent and transparent investigation and for those responsible to be brought to justice.
No end is in sight to bring a stop to the fighting, now considered one of the deadliest conflicts in Africa for civilians - despite US-led peace efforts.
