Rebels extend reach in central african republic
MSF: Central African Republic violence worst in years
The country descended into chaos when a mainly Muslim Seleka rebel alliance ousted then-president Francois Bozize in 2013.
Dozens of people suspected of committing war crimes and other rights abuses have avoided investigation and arrest.
The children are among more than 6,000 thought to have been made to do menial work for militants.
The incident took place as the Bangui Forum was drawing to an end, highlighting the simmering tensions.
The herders, from the Fulani ethnic group, were captured about a year ago near the town of Yaloke.
Doctors Without Borders says the death toll is nearing 3,000.
The peacekeepers have been accused of detaining, abusing, torturing and killing civilians.
The fighting started on Thursday after anti-Balaka fighters looted Seleka food reserves, residents said.
The EU drew up plans to send 800 - 1,000 soldiers to CAR to join 6,000 African and 2,000 French troops.
Mass killings have continued despite the presence of 2,000 French and 6,000 African Union peacekeepers.
The Red Cross recovered 13 bodies from the streets of Bangui on Monday and treated eight wounded.
A spokesman for anti-balaka fighters said he believed the new president could end the violence.
Lawmakers chose Mayor Catherine Samba-Panza to become interim president on Monday.
Regional leaders put pressure on Djotodiam who came to power only nine months ago.
Interim leader Michel Djotodia is weighing a possible amnesty for militias involved in violence.
Violence between militias continued despite the presence of French troops.
Francois Hollande vowed that the French operation would be limited in time.
Central African Republic has suffered series attacks from militia groups demanding control of resources.
The United Nations didn’t divulge the details of who was behind the attacks.