Two people, including a doctor and a child, were killed in protests in Khartoum on Thursday, the Central Sudan Doctors' Committee said.
"The child is named Mohammed Obaid," while the doctor, Babeker Abdul Hamid, is said to have died of gunshot wounds to the head, the committee said in a statement.
The Commission also announced the injury of five persons as a result of live ammunition and three other rubber bullets.
The committee said it was working to count the casualties it considered "serious."
In this context, the "Alliance of Sudanese Revolution Doctors" announced a comprehensive strike for doctors in all hospitals in the country without exception starting Thursday, saying that doctors will be committed to covering the emergency only, and to be in the fields to aid the demonstrators.
Protests have been renewed in Khartoum and several cities - including Gedaref (east) and Dioum (south) - to demand the overthrow of the regime and oust President Omar al-Bashir, according to eyewitnesses.
Hit and run
Al-Jazeera correspondent says the operations are taking place in the central districts of Khartoum between the security forces and the demonstrators who were walking towards the presidential palace.
Eyewitnesses monitored the demonstrators for security forces in a number of neighborhoods near the Gedaref market.
The leadership office of the ruling party in Sudan on Wednesday called on students and young people not to participate in marches on Thursday, noting that they are "calls harmful to the country."
The Union of Sudanese Professionals (an independent group of teachers, doctors and engineers) and opposition parties announced mass rallies in 12 Sudanese cities on Thursday, including a motorcade in the capital, Khartoum.
The protests began on 19 December in protest against the practices of the al-Bashir regime, killing 24 people in clashes, according to an official toll. Human Rights Watch and Amnesty International say at least 40 people, including children and medical staff, were killed.