Organisers of mass protests in Sudan have told the BBC they want the full dismantling of the "deep state" left behind by ousted leader Omar al-Bashir.
A spokesman said leaders of the past regime should be put on trial.
Mr Bashir was toppled by the army last week after 30 years in power and a military council has pledged elections in two-years time.
But protesters remain camped outside army HQ in the capital, Khartoum, demanding a civilian administration.
Reports on Monday said there had been efforts to disperse the sit-in but protesters joined hands and troops stepped back from a confrontation.
The crowd chanted "Freedom" and "Revolution", and appealed to soldiers to protect them, witnesses said.
The Sudanese Professionals' Association (SPA) which has spearheaded the protests, urged supporters to foil any attempt to disperse the sit-in.
"We hope that everyone will head immediately to the areas of the sit-in to protect your revolution and your accomplishments," it said in a statement.
On Sunday the transitional military council sought to appease protest leaders, telling them that key figures from the former government had been arrested. It is not clear who those officials are.
A military spokesman also promised not to disperse protesters and said the council was "ready to implement" whatever civilian government the opposition parties agreed.
In another development, 13 people were reportedly killed in an armed attack on protesters in the troubled region of South Darfur over the weekend.
"Gunmen" attacked the anti-government protest at a camp for displaced people about 17km (10 miles) east of the regional capital, Nyala, according to the privately owned Darfur 24 news website.
Mr Bashir has been indicted on charges of war crimes and crimes against humanity in Darfur by the International Criminal Court. He denies any wrongdoing.
What are protesters demanding?
Amjad Farid, an SPA spokesman, told the BBC that they "completely rejected" the military council currently leading Sudan.
He said demands included the "full dissolution of the deep state" and the dismantling of state intelligence agencies.
Opposition politician Mubarak al Fadil told the BBC that the role of the military should decrease over time.
Meanwhile, protesters in Khartoum remained in defiant mood.
"We are here to remove the entire system, a system that does not give service equally to the people," Mohammed Jakur told AFP news agency. "A system that leave[s] people under poverty. A system that does not allow Sudan, as a rich country with human and natural resources, to act as any other country in the world."