0845 GMT: The Wall Street Journal has picked up on the Sunday protests, with an article by Sarah Childress.
0820 GMT: A statement from Sudanese police says its forces contained a “limited riot” staged by some students, including some “agitators". According to the police release, 40 students and 30 citizens were arrested, and all students were released on bail.
0755 GMT: Ahlia University in Omdurman has been closed for the rest of the week.
0500 GMT: Mohamed Abdelrahman, a student at Al-Ahlyaa University, was reportedly killed in the Khartoum demonstrations.
31 JANUARY, 0137 GMT: Pro-government newspapers in Sudan beat the same drum as their counterparts in Egypt: stability. Al Jazeera reports:
Pro-government newspapers carried front page warnings against protests which they said would cause chaos and turmoil.
The Sudan Vision daily's editorial blamed the opposition.
"Our message to those opposition dinosaurs is to unite their ideas and objectives for the benefit of the citizens if they are really looking for the welfare of the Sudanese people," it read.
0026 GMT: Reuters reports that during the protests in many parts of Khartoum today, the police used batons and violence to disperse the protesters who were chanting, "Revoltution, Revolution until victory!". Social networkings groups have sprung up that have helped channel Sudanese anger at the government with one, "Youth for Change" has attracted thousands of members.
Pictures of clashes in Khartoum:
Reuters reports on arrests:
The pro-democracy group Girifna ("We're fed up") said nine members were detained the night before the protest and opposition party officials listed almost 40 names of protesters arrested on Sunday. Five were injured, they added.
2240 GMT: More videos from protests in Egypt:
2200 GMT: No one took much notice when a Facebook page was created, calling on Sudanese to join protests today against the 21-year rule of President Omar al-Bashir. Reports, however, suggest that a protest did take place today in the Sudanese capital Khartoum, joined by university students and mostly youngsters.
A poor African country that went through a decades-long Civil War with its southern third - which recently voted to secede - and another one is ongoing in its Western region of Darfur, Sudan is located south of Egypt so the spill-over of anti-government protests here might seem natural to some observers.
Al Jazeera reports:
Hundreds of armed riot police on Sunday broke up groups of young Sudanese demonstrating in central Khartoum and surrounded the entrances of four universities in the capital, firing teargas and beating students at three of them.
Police beat students with batons as they chanted anti-government slogans such as "we are ready to die for Sudan" and "revolution, revolution until victory".
There were further protests in North Kordofan capital el-Obeid in Sudan's west, where around 500 protesters engulfed the market before police used tear gas to disperse them, three witnesses said.
Here's a video from Khartoum:
We will update more in a few minutes as this is a developing story.