Police in Sudan have fired tear gas at demonstrators in the cities of Omdurman and Atbara, where people held a third day of protests over the rising price of bread and fuel.

Supporters of Sudan's main opposition group, the Umma Party, gathered after Friday prayers and chanted anti-government slogans.

Demonstrations were also reported in other cities, including in El Obeid, south-west of Khartoum.

The BBC's Mohanad Hashim reports that Sudan's minister of telecommunications was replaced overnight with a security general, and internet and social media access has been curtailed.

On Thursday, at least eight people were killed during demonstrations.

Rights group Amnesty International has condemned the killings and says detained protesters must be freed.