A monitoring group says at least 28 people were killed in Boga and 22 in Tchabi, villages lying about 10 kilometres apart as local sources attributed the attacks to the Daesh-linked Allied Democratic Forces, ADF.
At least 50 people have been killed overnight in two new attacks in the eastern Democratic Republic of Congo, monitors said, as a local official blamed a notorious group linked to Daesh.
Citing a toll that is "still provisional," the Kivu Security Tracker (KST) group said 28 people were killed in Boga and 22 in Tchabi, villages lying about 10 kilometres (six miles) apart in an area that has long had a reputation for Allied Democratic Forces (ADF) attacks and ethnic friction.
The earlier toll was at least 39 dead.
A local civil society leader attributed the attacks to the ADF, a historically Ugandan extremist group blamed for a string of massacres in the past 18 months.
Two local officials reached in Boga by AFP said the assailants attacked a camp for displaced people.
They said 36 bodies had been found so far in Boga, a figure that had yet to be independently confirmed.
Security forces take over civilian authorities
The KST, a respected NGO that monitors violence in eastern DRC, said the wife of a traditional leader in Benyali-Tchabi had been killed in the attack on Tchabi.
The ADF is the deadliest of an estimated 122 armed militias that roam the mineral-rich east of the DRC, many of them a legacy of two regional wars that ran from 1996 to 2003.
As of Friday, the KST estimated that at least 1,228 civilians have been killed in the Beni territory of North Kivu alone since November 2019, when DRC forces launched a crackdown that splintered the ADF into smaller groups.
The latest deaths brought the toll from ADF-suspected killings to at least 78 in six days.
Three other attacks since last Tuesday have claimed 39 lives.
On March 11, the United States said the ADF was linked to Daesh.
The ADF was called Daesh-DRC, or Madina at Tauheed Wau Mujahedeen.
DRC President Felix Tshisekedi on May 6 proclaimed a 30-day "state of siege" in North Kivu and Ituri in a bid to curb bloodshed by the ADF.
Under the move, military and police officers have taken over from civilian authorities.
READ MORE: ADF militia kills scores in eastern DRC