Angry crowds have taken to the streets in Khartoum and other cities since December 19 after a government decision to raise prices of bread.
Hundreds of worshippers emerged from the mosque in Khartoum’s twin city of Omdurman on the west bank of the Nile Friday to protest but anti-riot police fired tear gas to disperse the crowd, witnesses said.
Demonstrations also erupted in some areas of north Khartoum after the weekly prayers, witnesses said.
The protests came as opposition groups called for more anti-government rallies to be held over the next few days.
A group of opposition parties met late on Wednesday and agreed to “push for more protests” in the coming days, the Sudanese Communist Party said in a statement.
Police and security officers remained deployed in several parts of the Sudanese capital on Friday.
Crowds of people have rallied since last week after the government raised the price of a loaf of bread from one Sudanese pound to three (from about two to six US cents).
Sudan is facing an acute foreign exchange crisis and soaring inflation, despite Washington lifting an economic embargo in October 2017.
Inflation is running at 70 percent and the Sudanese pound has plunged in value, while shortages of bread and fuel have regularly hit several cities.