The victims were hacked to death by a notorious militia group with machetes in Oicha, about 30 kilometres from the city of Beni, a local official said.
Democratic Republic of Congo recorded 2,382 cases of Ebola, of which 1,606 were fatal, the Health Ministry says.
Fighting between Banunu and Batende communities in Mai-Ndombe province in Democratic Republic of the Congo caused killings, UN says. Meanwhile, the African Union is set to discuss the violence and allegations of election fraud, in Ethiopia meeting.
"I'm going to try my best to perpetuate his [Etienne Tshisekedi] dream, his dream of a country of rule of law, of a better Congo, where our sons and daughters can flourish”
Election board announces presidential election, delayed several times since 2016, would now take place on December 30 due to a fire last week that destroyed voting materials. Opposition parties say the new date is "a red line".
This is the latest of several delays in the election originally scheduled for late 2016, amid opposition concerns that President Joseph Kabila was finding ways to stay in power.
The attack follows the death of 12 Congolese soldiers and seven UN peacekeepers in clashes with militias earlier this week in Democratic Republic of Congo's Ebola-hit east.
The introduction of electronic voting and the authorities’ exclusion of a number of candidates from the ballot has united opposition parties ahead of the long-delayed vote on December 23 that will choose a successor to Joseph Kabila.
Fresh cases in the northwest of the African country surfaced after the latest outbreak in capital Kinshasa killed 17 people, health officials say.
Catholic activists called for protests on Sunday over the delaying of elections until December 2018 by President Joseph Kabila.
At least 15 UN soldiers, mostly from Tanzania, were killed by suspected Ugandan rebels in a raid on a base in the Democratic Republic of Congo late on Friday.
The UN Human Rights Council chief called for an independent, international probe into the "horrific attacks" allegedly carried out by Bana Mura militia against civilians.
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