Thousands of people have rallied in and around Sudan's capital, Khartoum, in a fifth day of protests against the government's decision to cut back fuel subsidies.
In Khartoum's twin city of Omdurman, a group of at least 2,000 protesters defied a heavy security presence, including army trucks parked on the street, to march after weekly Muslim prayers.
Some demonstrators shouted anti-government slogans and expressed anger over a police crackdown on previous protests.
Smaller protests took place in Khartoum's northern Bahri district, the town of Wad Madani and other locations. Police fired tear gas to disperse some of the rallies.
The unrest has become one of the biggest challenges to President Omar al-Bashir's government since he seized power in 1989.
The government says 29 people have died in the unrest, while two human rights groups say they have confirmed at least 50 protesters were killed.
Amnesty International and the African Center for Peace Studies urged the government to halt violence against demonstrators.
The government decision to cut subsidies caused a sharp rise in fuel prices, a development that angered many.
Sudan's fuel crisis began after South Sudan became independent in 2011. The new nation took over about three-quarters of Sudan's crude oil production.