In Ethiopia, at least 1,000 suspects have been arrested over the violence in Sebeta town near the capital, Addis Ababa, the state-affiliated Fana Broadcasting Corporate has reported.
Only 40 to 50 suspects were natives of the town, while the majority were from other parts of Oromia region, the mayor, Ararsa Merdasa, is quoted as saying.
Ethiopia has declared a state of emergency to curb unrest in Oromia and Amhara, two regions that have seen a wave of anti-government protests since last year.
The mayor added that if there were any innocent people among the 1,000 suspects, they would be released once investigations were concluded.
Mr Ararsa said that residents had provided details of the rioters, including the crime they had committed, following public meetings.
More arrests were expected, he added.
Businessmen, who experienced massive losses after their properties were destroyed during the protests, are attending a "peace conference" in Sebata, and called for better security, FBC reports.
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Egypt has enacted a new law to make it easier to prosecute people smugglers.
It imposes stiff prison sentences and fines on traffickers and anyone else helping illegal migrants on their journey, while giving migrants themselves greater humanitarian protection.
About 200 migrants drowned when their boat capsized off Greece last month after setting off from Egypt.
There has been a big upsurge of people smuggling along Egypt's Mediterranean coastline since Turkey reached a deal with the European Union to stem the flow into Europe.
South Sudan's government is blaming rebels loyal to former Vice-President Riek Machar for clashes in the second city, Malakal, which left 56 rebels dead, the AFP news agency reports.
Four government soldiers were also killed in the fighting over the weekend, it quotes army spokesman Brigadier General Lul Ruai Koang as saying.
Forces loyal to President Salva Kiir invited journalists to the region on Sunday to show they were in control of the area, and an AFP photographer reported seeing up to 40 bodies in the places he could access.
South Sudan, which gained independence in July 2011, descended into war just two and a half years later when Kiir in December 2013 accused his former deputy and political rival Machar of plotting a coup.
In June forces loyal to Mr Machar clashed with Mr Kiir's leaving hundreds dead and thousands displaced.
Mr Kiir fled the capital Juba with some of his troops to the Democratic Republic of Congo, from where he flew to Sudan. He is currently in South Africa.
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The United Nations, African Union, US and others say they are deeply concerned about aspects of a process to choose a new parliament and president in Somalia.
They say individuals with a history of criminality, violence and terrorism are being included on lists of candidates for a new senate.
They describe this as a regressive step which will undermine the legitimacy of the new parliament.
Somalia has had no effective central authority for a quarter of a century, and is currently holding a complex process to select a new administration.