Bangui - Fresh fighting broke out in the strife-torn Central African Republic on the eve of an announcement on Sunday of the candidates seeking to become the new interim president.
Sectarian violence has gripped the landlocked country after a March 2013 coup launched by the mostly Muslim Seleka rebels, and the UN has warned that the bloodshed could turn into genocide.
As clashes raged unabated on Saturday, Save the Children said a grenade attack on Friday on a truck convoy carrying Muslims fleeing to the north-west of the country had killed 23 people, including three children.
"It is a sign of the still fraught and highly dangerous situation in the Central African Republic that children and their families have been attacked and killed while trying to evacuate to safety," said Robert Lankenau from the charity.
The Seleka were disbanded after installing their leader as president in the mainly Christian country.