The Sudanese army announced on Monday its control of Arbaeen Street in Omdurman, while the Rapid Support Forces confirmed their control of a military garrison in North Darfur, at a time when the United Nations accused the conflicting parties of committing serious violations against civilians and attacking hospitals.

Eyewitnesses reported renewed fierce fighting and artillery shelling between the Sudanese army and the Rapid Support Forces in the capital's three cities, Khartoum, Khartoum North and Omdurman.

The Al Jazeera correspondent said that the sounds of heavy weapons did not stop in Al-Ghaba Street, the industrial zone, and Hilla Al-Jadeeda, west of Khartoum. The areas of Omdurman also witnessed clashes and successive explosions were heard south of the city, and in the Bahri area north of Khartoum.

The clashes come despite Saudi Arabia and the United States calling on Sudan's army and Rapid Support Forces on Sunday to agree on a new "effective" ceasefire after a truce brokered by the two countries expired on Saturday evening.

The Sudanese sides accuse each other of starting the fighting first, and committing violations during a series of truces that failed to put an end to the clashes.

Hit-and-run

On the other hand, military sources in the Sudanese army told Al Jazeera that the army forces took control of Arbaeen Street in Omdurman in the capital Khartoum.

The sources pointed out that the neighborhoods of "Abbasiya" and "Pant mayor", adjacent to Arbaeen Street, witnessed clashes, during which the army was able to destroy a car belonging to the Rapid Support, and control two cars, in addition to combing Arbaeen Street.

Earlier on Monday, Sudan's military confirmed to Al Jazeera that it had regained control of the Nujumi military base in Jebel Awliya, south of Khartoum, after heavy battles with the Rapid Support Forces.

On Monday, the Rapid Support Forces announced the control of the garrison of the 22nd Infantry Brigade in the city of Kutum in Sudan's North Darfur state.

The RSF posted a video on its Facebook account showing its members inside the garrison and its commander inspecting all facilities.

Youssef Ezzat, political advisor to the RSF commander, said the RSF's vision for a solution is based on the need to address the roots of the war in a way that establishes sustainable peace and stability under democratic civilian rule.

Ezzat reiterated – during his meeting with the Speaker of the Kenyan Parliament Moses Waitangola – saying that the war is imposed on the Rapid Support Forces from the leaders of the Sudanese army coup and elements of the former regime.

UN accusations

Politically, the United Nations Mission in Sudan (UNMIS) on Monday accused the conflicting parties of committing serious violations against children, as well as killings and attacks on civilians and hospitals.

Human rights officials have documented dozens of incidents, including killings, arrests, possible disappearances, attacks on hospitals, sexual violence and other grave violations against children, committed by parties to the conflict.

She added that communication is currently under way with the parties to the conflict in order to take action against the perpetrators and to protect civilians and their property.

In this context, the mission described the situation in the capital Khartoum, Omdurman and Bahri as very worrying, in light of the continued clashes between the Sudanese army and the Rapid Support Forces.

The situation also continued to deteriorate in Western Darfur, Garsila (Central Darfur) and Kutum (Northern Darfur), affecting civilians, including women and children, many of whom were trapped between the conflicting parties.

On Sunday, Saudi Arabia and the United States called on Sudan's military and the Rapid Support Forces to agree on a new "effective" ceasefire.

Since April 15, Khartoum and other cities have been witnessing clashes between the army led by Abdel Fattah al-Burhan and the Rapid Support led by Mohamed Hamdan Daglo (Hemedti), which left hundreds dead and thousands injured among civilians, in addition to a new wave of displacement and asylum in one of the world's poorest countries.