The Central Committee of Sudanese Doctors said two other people have been killed by police as they were demonstrating against the military rule in the Capital, Khartoum.
One was hit on the head by a tear gas cannister and died from a brain haemorrhage, while another died after being struck in the neck by a tear gas cannister.
The Sudanese police say 86 people were arrested during Sunday’s unrest. The official Sudanese news agency described those arrested as “unruly protesters”.
The UN says it is trying to start talks in Sudan to resolve the political crisis and ensure there is a transition to democracy.
At least 86 people have been killed since the protests began, police say.