Sudanese police dispersed "illegal gatherings" in the capital Khartoum and several cities in other states on Sunday, the official Sudan News Agency (SUNA) said.
Reuters reports that Sudan has been rocked by persistent anti-government demonstrations since Dec. 19. The protests were initially triggered by price rises and cash shortages but evolved into demonstrations against President Omar al-Bashir's 30-year rule.
Police spokesman Hashem Ali told SUNA that "these illegal gatherings were dealt with by police and its squad using tear gas". He said police in Khartoum state received reports of injuries among citizens and police.
Police arrested an unspecified number of protesters and filed legal complaints against them under emergency measures declared last month, SUNA said.
In addition to the emergency measures, last month Bashir also dissolved the central government, expanded police powers and replaced state governors with security officials.
The official state news agency has rarely reported on the demonstrations since they began late last year.
READ: Calls for release of detained protesters rejected by Sudan authorities