Ahmat Ibrahim Nadjad said today that Seleka positions came under attack Sunday near the central town of Grimari. Thousands have died in violence between Seleka and anti-Balaka fighters in the past 16 months.
The Seleka rebels seized power in 2013, but outrage over human rights abuses pressured their leader to step down in January, setting off reprisal attacks by the anti-Balaka.
The ceasefire was signed last Wednesday after three days of talks in Republic of Congo, though many doubted it would hold.
