Last week, Sudan's military ousted longtime President Omar al-Bashir following four months of street protests against his rule, then appointed a military council that it says will rule for two years or less while elections are organized.
Sudan's military rulers faced pressure from demonstrators and Western governments to hand power to a new civilian government Monday as activists warned of an attempt to disperse a 10-day-old mass protest outside army headquarters.
It said there were continuing attempts to disband the sit-in.
The SPA has demanded the immediate handover of power to a civilian transitional government as well as the prosecution of former officials. An officer is heard saying they came to "clean" the area.
"We hope that everyone will head immediately to the areas of the sit-in to protect your revolution and your accomplishments", the SPA said.
Some members of the former government in Sudan have been arrested by the transitional military council which is now running the country, according to reports coming out of the country on Monday morning.
The sit-in outside the compound, which also includes the intelligence headquarters and the presidential residence, began on April 6, after more than three months of protests triggered by a deepening economic crisis.
"We want to set up a civilian state based on freedom, justice and democracy", a council member, Lieutenant General Yasser al-Ata, told several political parties, urging them to agree on the figures to sit in civilian government.
The U.S., Britain and Norway on Sunday urged the military authorities to "listen to the calls from the Sudanese people".
"These structures represent the transitional civil authority completely liberated from all the symbols of corruption", it said in the statement.
A military spokesman said Sunday it will name a civilian prime minister and Cabinet - but not a president - to help govern the country.
British ambassador Irfan Siddiq met with Himeidti "not to endorse or confer legitimacy" to the transitional military council, Siddiq said on Twitter, "but to stress steps United Kingdom wants to see taken to improve situation in Sudan". He did however announce the appointment of a new NISS head after the intelligence agency's chief Salih Ghosh resigned on Saturday.
The dissolution of Bashir's National Congress Party, with its top leaders brought to justice - including the ousted president.
He also pledged that individuals implicated in killing protesters would face justice and that protesters detained under a state of emergency imposed by Bashir during his final weeks in power would be freed.
The foreign ministry said the military council's chief 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".