A number of demonstrators were injured after Sudanese security forces fired tear gas during demonstrations today, Saturday, calling for the return of civilian rule, while the Forces for Freedom and Change warned against the use of force.

Meanwhile, the UN envoy urged the protection of the demonstrators and denounced the cut off of communications services.

Security forces fired tear gas canisters to disperse demonstrators who tried to reach the presidential palace in the capital, Khartoum, which led to injuries.

Al-Jazeera correspondent reported that clashes took place between the police and demonstrators in Khartoum North, during the police attempt to prevent the demonstrators from crossing the "Al-Mak Nimr" bridge towards the Republican Palace.

And since the hours of this morning, it was announced a complete interruption of internet and mobile services throughout Sudan, and Khartoum State announced that all bridges on the Nile have been closed since yesterday evening, Friday.

The forces of the "Declaration of Freedom and Change - the Central Council" warned the Sudanese authorities against using force to suppress peaceful demonstrations.

The leader of the Forces for Freedom of Change and Minister of Presidential Affairs and Cabinet in the ousted government, Khaled Omar, said, "The coup authority has no choice but to hand over power to the people. This is a people who has broken all restrictions and will never submit to tyranny."

And he added in a post on Twitter that "cutting off the Internet and communications will not deter anyone from moving forward until the establishment of a civil, democratic state that provides a decent life for this great people."

Hit and run

The demonstrators gathered a few dozen meters from the Republican Palace, the seat of the transitional authority headed by General Abdel Fattah Al-Burhan, the army chief.

The pioneers of social networking sites in Sudan shared videos showing the hit-and-run movement between the demonstrators and the security forces on Al-Qasr Street in Khartoum.

Demonstrators trying to cross the bridges linking Khartoum with its suburbs also face a barrage of tear gas canisters.

Demonstrations also took place in "Madani", located about 150 km south of Khartoum, in Atbara in the north and Port Sudan in the east, according to witnesses.

Calls to the international community

For its part, the Central Committee of Sudan Doctors called on the international community to pay attention to the events taking place in Sudan and the aspirations of the people for a country free from all forms of military and dictatorial rule.

Volker Peretz, the representative of the United Nations Secretary-General in Sudan, called on the Sudanese authorities and security forces to protect the demonstrations.

Peretz said that freedom of expression and full access to the Internet is a human right, noting that international conventions prohibit the arrest of anyone because of his intention to protest peacefully.

For her part, the Norwegian ambassador to Sudan expressed her concern over reports of arrests, which she described as illegal, and the repression of civil society in Sudan.

The Ambassador of Norway called on the Sudanese authorities to seize the opportunity to build the required confidence, by protecting all demonstrators.