The victims were mostly targeted in isolated incidents of "score-settling" and the number was likely to rise as violence continued in pockets of Bangui, Antoine Mbao-Bogo, the local Red Cross president, said.
"Among the dead we've found night watchmen, street children and the victims of stray bullets," Mbao-Bogo said.
Many streets in Bangui were deserted Sunday with residents of some neighbourhoods holed up fearing further violence.
The violence reached new heights in December, killing more than 1,000 people and prompting nearly 1 million to flee their homes. Seleka attacks on Christian civilians led to retaliatory attacks by Christian militias against Muslim civilians and mosques.
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Religious violence continued this weekend amid uncertainty over who will rule the chronically unstable country and lay the groundwork for new elections. A national transitional council led by Alexandre Ferdinand Nguendet has two weeks to choose another interim president to replace Djotodia.
And in Galabadja, a distraught former member of Seleka opened fire seemingly at random yesterday, killing and injuring an untold number of bystanders, said witness Sylvain Namboa.