BBC reported that heavy gunfire and the roar of warplanes have shattered plans for a ceasefire in the Sudanese capital Khartoum, which was due to start at 18:00 (16:00 GMT).
Fighting was reported around the army headquarters by the airport in the city centre, which is surrounded by residential areas.
Two rival generals at the heart of the conflict had agreed to a 24-hour humanitarian pause. Nearly 200 people have been killed in the fighting which began on Saturday. Residents are low on food and water as clashes between the army and the Rapid Support Forces (RSF) paramilitary group continue.
On Tuesday, UN Secretary General António Guterres’ spokesman said, “The fighting in Sudan, including Khartoum and various other locations, is continuing. No sign of real abatement of the fighting.”