Sudanese authorities have deployed troops around vital installations and gas stations in Khartoum following days of protests and rioting over gas price hikes that left at least 30 dead.
The army also reinforced positions Thursday around military headquarters in the capital and along the city's university road, which is close to the presidential palace.
Violent protests erupted in Sudan on Monday when President Omar al-Bashir's government hiked fuel prices.
Hospital officials and activists say at least 30 have been killed since, mostly in Khartoum. They spoke on condition of anonymity as they were not authorized to talk to media.
Protesters torched 20 gas stations in Khartoum and elsewhere, and set fire to several police stations. Stores have been looted in parts of the city.
Khartoum was quiet by late morning on Thursday.