A U.S. diplomatic convoy was fired upon in Sudan Monday but those inside were unharmed, U.S. Secretary of State Antony Blinken told reporters Tuesday. He called the incident "reckless" and "irresponsible."  

Blinken, who is in Japan for a Group of Seven foreign ministers meeting, said a convoy of clearly marked U.S. Embassy vehicles came under fire and that preliminary reports indicate the attackers were linked to a powerful force fighting with the Sudanese army for control of the country for a third consecutive day. He said everyone in the convoy was safe and at home.

A contingency planning for U.S. personnel in Sudan was underway with "interagency partners," the State Department said Tuesday in a statement to CBS News. The State Department also said that the Khartoum airport remains closed and that there are no plans for a coordinated evacuation of American civilians, who are still advised to stay indoors and shelter in place. 

Blinken called for an immediate 24-hour ceasefire as a step toward a longer truce. There were reports that the Sudanese army had agreed to a 24-hour halt to hostilities, to begin Tuesday evening, after the paramilitary forces it is fighting said they would also adhere to such a ceasefire. However, Stéphane Dujarric, spokesman for U.N. Secretary-General Antonio Guterres, told CBS News correspondent Pamela Falk on Tuesday that the United Nations could not confirm any agreement for a ceasefire.

Blinken said he had spoken by phone with Sudan's army chief, General Abdel Fattah al-Burhan, and the leader of the paramilitary Rapid Support Forces (RSF), General Mohamed Hamdan Dagalo, known as Hemedti, and told them any danger to U.S. diplomats and residents in Sudan or U.N. staff and other humanitarian partners was unacceptable.

In a joint statement Tuesday, the G-7 foreign ministers condemned the fighting. "We urge the parties to end hostilities immediately without pre-conditions," it said, calling for them to return to negotiations and reduce tensions.

As explosions and gunfire thundered outside, Sudanese in the capital Khartoum and other cities huddled in their homes.

"The fighting remains underway," Atiya Abdulla Atiya of the Sudan Doctors' Syndicate told The Associated Press. "We are hearing constant gunfire."

At least 185 people have been killed and over 1,800 wounded since the fighting erupted, U.N. envoy Volker Perthes told reporters. 

The two sides are using tanks, artillery and other heavy weapons in densely populated areas. Fighter jets swooped overhead and anti-aircraft fire lit up the skies as darkness fell.

The toll could be much higher since there are many bodies in the streets around central Khartoum that no one can reach because of the clashes. There's been no official word on how many civilians or combatants have been killed. A doctors' group earlier put the number of civilian deaths at 97.

"The targeting of humanitarian workers and facilities continues in Sudan. We're receiving reports of attacks and sexual violence against aid workers. And yesterday, our (office) in South Darfur was looted," Martin Griffiths, the Undersecretary General for Humanitarian Affairs and Emergency Relief Coordinator, wrote on Twitter on Tuesday. 

The sudden outbreak of violence over the weekend between the nation's two top generals, each backed by tens of thousands of heavily armed fighters, trapped millions of people in their homes or wherever they could find shelter, with supplies running low and several hospitals forced to shut down.

Top diplomats on four continents scrambled to broker a truce, and the U.N. Security Council was set to discuss the crisis.

She said a shell stuck a neighbor's house Sunday, killing at least three people. "We couldn't take them to a hospital or bury them."

In central Khartoum, sustained gunfire erupted and white smoke rose near the main military headquarters, a major battlefront. Nearby, at least 88 students and staffers have been trapped in the engineering college library at Khartoum University since the start of fighting, one of the students said in a video posted online Monday. One student was killed during clashes outside and another wounded, he said. They do not have food or water, he said, showing a room full of people sleeping on the floor.

Even in a country with a long history of military coups, the scenes of fighting in the capital and its adjoining city Omdurman across the Nile River were unprecedented. The turmoil comes just days before Sudanese were to celebrate Eid al-Fitr, the holiday marking the end of Ramadan, the Islamic month of fasting.

Under international pressure, Burhan and Dagalo had recently agreed to a framework agreement with political parties and pro-democracy groups, but the signing was repeatedly delayed as tensions rose over the integration of the RSF into the armed forces and the future chain of command.

The U.S., U.N. and others have called for a truce. Egypt, which backs Sudan's military, and Saudi Arabia and the United Arab Emirates — which forged close ties to the RSF as it sent thousands of fighters to support their war in Yemen — have also called for both sides to stand down.

Egyptian President Abdel Fattah el-Sissi said late Monday that Cairo was in "constant contact" with both the army and the RSF, urging them to halt the fighting and return to negotiations.

But both generals have thus far dug in, demanding the other's surrender.

The European Union's foreign policy chief, Josep Borrell tweeted that the EU ambassador to Sudan "was assaulted in his own residency," without providing further details. A spokesperson for Borrell told Agence France-Presse the veteran diplomat was "OK" following the assault.

Dagalo, whose forces grew out of the notorious Janjaweed militias in Sudan's Darfur region, has portrayed himself as a defender of democracy and branded Burhan as the aggressor and a "radical Islamist." Both generals have a long history of human rights abuses and their forces have cracked down on pro-democracy activists.

Heavy gunbattles raged in multiple parts of the capital and Omdurman, where the two sides have brought in tens of thousands of troops, positioning them in nearly every neighborhood.

Twelve hospitals in the capital area have been "forcefully evacuated" and are "out of service" because of attacks or power outages, the Sudan Doctors' Syndicate said, out of a total of around 20. Four hospitals outside the capital have also shut down, it added in a statement late Monday.

Hadia Saeed said she and her three children were sheltering in one room on the ground floor of their home for fear of the shelling as gunfire rattled across their Bahri district in north Khartoum. They have food for a few more days, but "after that we don't know what to do," she said.

Residents said fierce fighting with artillery and other heavy weapons raged Monday afternoon in the Gabra neighborhood southwest of Khartoum. People were trapped and screaming inside their homes, said Asmaa al-Toum, a physician living in the area.

Fighting has been particularly fierce around each side's main bases and at strategic government buildings — all of which are in residential areas.

The military on Monday claimed to have secured the main television building in Omdurman, fending off the RSF after days of fighting. State-run Sudan TV resumed broadcasting.

On Sunday, the RSF said it abandoned its main barracks and base, in Omdurman, which the armed forces had pounded with airstrikes. Online videos Monday purported to show the bodies of dozens of men said to be RSF fighters at the base, strewn over beds, the floor of a clinic and outside in a yard. The authenticity of the videos could not be confirmed independently.

The military and RSF were also fighting in most major centers around the country, including in the western Darfur region and parts of the north and the east, by the borders with Egypt and Ethiopia. Battles raged Monday around a strategic airbase in Merowe, some 350 kilometers (215 miles) northwest of the capital, with both sides claiming control of the facility.

Only four years ago, Sudan inspired hope after a popular uprising helped depose long-time autocratic leader Omar al-Bashir.

But the turmoil since, especially the 2021 coup, has frustrated the democracy drive and wrecked the economy. A third of the population — around 16 million people — now depends on humanitarian assistance in the resource-rich nation, Africa's third largest.

Save the Children, an international charity, said it has temporarily suspended most of its operations across Sudan. It said looters raided its offices in Darfur, stealing medical supplies, laptops, vehicles and a refrigerator. The World Food Program suspended operations over the weekend after three employees were killed in Darfur, and the International Rescue Committee has also halted most operations.

With the U.S., European Union, African and Arab nations all calling for an end to fighting, the U.N. Security Council was to discuss the developments. U.N. Secretary-General Antonio Guterres said he was consulting with the Arab League, African Union and leaders in the region, urging anyone with influence to press for peace.

–Margaret Brennan contributed reporting.

In:
• Antony Blinken
• Sudan
• United Nations
• G-7
• European Union