Sudan conflict: Landmark skyscraper in Khartoum engulfed in flames
Videos posted online on Sunday showed the iconic Greater Nile Petroleum Oil Company Tower engulfed in flames.
“This is truly painful,” said Tagreed Abdin, an architect of the building, in a post on X, formerly known as Twitter.
Air strikes and ground battles have continued in Khartoum and other towns and cities since fighting broke out in April.
Over one million people have been forced to flee the country, the UN has said.
The violence in Sudan began on 15 April, triggered by a power struggle between the leaders of the Sudanese army and the paramilitary Rapid Support Forces (RSF).
It followed days of tension as members of the RSF were redeployed around the country in a move that the army saw as a threat.
The Sudan War Monitor, which provides analysis of the conflict, said the RSF had attacked areas controlled by the army on Saturday, including an office block at the justice ministry. Several government buildings are reported to have caught fire as a result of the attack.
Attacks on army premises continued into Sunday, witnesses told AFP news agency.
Read more: BBC