The 21 slain civilians included six men and one woman shot in the head near the Katindo military camp in Goma.
Mr Osifeso said the rescued victims comprised 57 males and 26 females, including an infant.
The World Bank also predicted a grim future for Nigeria.
Africa CDC said a new variant has also emerged, raising fresh concerns.
The prime minister urged the world to act and impose “dissuasive sanctions” amid mass displacements and summary executions.
UNICEF has issued a warning over escalating violence in the eastern Democratic Republic of Congo and its impact on children.
The UN Human Rights Council will discuss the devastating violence in the east of the Democratic Republic of Congo on Friday.
On January 28, the security council convened its second emergency meeting in three days to address the escalating crisis in Goma.
The ministry stated that 592 cases of the disease have been reported since October.
Joe Biden will use his visit to Angola on Tuesday, the first by a U.S. president to the sub-Saharan African country.
