Kenya's President Uhuru Kenyatta has appealed for calm in a televised speech on the eve of the country's general election.
He urged the 19 million registered voters to turn out in great numbers, but to "do so in peace".
Rwandans are going to the polls in presidential elections, with incumbent Paul Kagame widely expected to win his third term in office.
The 59-year-old is being challenged by Frank Habineza of the Democratic Green Party of Rwanda, and independent candidate Philippe Mpayimana.
Mr Kagame is credited with the country's rapid economic development since taking office in 2000.
The Kenyan election official whose body was found earlier this week had been severely tortured and strangled to death, an autopsy has found. Chris Msando had deep scratches and cuts on his back and hands, the chief government pathologist said.
Mr Msando was in charge of Kenya's computerised voting system for next Tuesday's presidential elections.
His body was discovered next to the corpse of a woman in a forest on the outskirts of Nairobi at the weekend.
Dangote Industries Limited sold 2.3 per cent stake in Dangote Cement Plc to foreign investors on Tuesday in a stock market deal valued at N86.1bn ($236m).
Africa’s biggest cement maker has been selling small stakes to increase its free float, which is well below the Nigerian Stock Exchange’s required level.