0438 GMT April 23, 2019
Thousands remained camped outside the complex in Khartoum overnight after protest leaders issued demands to the military council set up following the ouster of veteran president Omar al-Bashir, AFP reported.
The organization that spearheaded the months of protests leading to Bashir's fall, the Sudanese Professionals Association, called on their supporters to boost the numbers at the complex.
"There is an attempt to disperse the sit-in from the army headquarters area, they are trying to remove the barricades," the SPA said in a statement, without saying who was responsible.
"We call on our people to come immediately to the sit-in area to protect our revolution."
Witnesses said several army vehicles had surrounded the area and that troops were seen removing the barricades which demonstrators had put up as a security measure.
Britain's Ambassador to Khartoum, Irfan Siddiq, met the new military council's deputy and stated his "top request was no violence and no attempt to forcibly break the sit in".
In the meeting with Mohammad Hamdan Daglo, widely known as Himeidti, Siddik wrote on Twitter that he also backed the SPA's call for a civilian administration.
The talks came a day after the embassies of Britain, the United States and Norway issued a joint statement saying the "legitimate change" the Sudanese people demanded had not taken place.
"It is time for the transitional military council and all other parties to enter into an inclusive dialogue to effect a transition to civilian rule," they said.
The SPA has said a transitional government and the armed forces must bring to justice both Bashir and officials from his feared National Intelligence and Security Service (NISS).
Council 'committed' to transition
The military council on Sunday met with political parties and urged them to agree on an "independent figure" to be prime minister.
"We want to set up a civilian state based on freedom, justice and democracy," a council member, Lieutenant General Yasser al-Ata, told members of several political parties.
A 10-member delegation representing the protesters delivered a list of demands during talks with the council late Saturday, according to a statement by the Alliance for Freedom and Change umbrella group.
But in a press conference, the council's spokesman did not respond to the protesters' latest demands.
He did however announce the appointment of a new NISS head after the intelligence agency's chief Salih Ghosh resigned on Saturday.
The Foreign Ministry said military council head General Abdel Fattah al-Burhan was "committed to having a complete civilian government" and urged other nations to back the council in order to achieve "the Sudanese goal of democratic transition".
In the latest shake-up, Burhan on Monday named Lieutenant General Hashim Abdelmotalib as the army's chief of staff.
The military council's deputy Himeidti is a field commander for the Rapid Support Forces (RSF) counter-insurgency unit, which rights groups have accused of abuses in Darfur.
But at the protest site Monday, witnesses said demonstrators put up a banner with a photograph of Himeidti which read: "We will not forget that you stood with us."
Burhan has pledged that individuals implicated in killing protesters would face justice and that demonstrators detained under a state of emergency imposed by Bashir during his final weeks in power would be freed.
Bashir ruled Sudan with an iron fist for 30 years before he was deposed last week following mass protests that have rocked the country since December.