"There have been attacks blamed on suspected ADF members near the border with Nord Kivu (province), which left at least six people dead in Irumu territory," the vice governor of Ituri province, Pacifique Keta, said.
Keta added that the death toll was provisional and security had been beefed up.
Separately, Gill Gotabo, a civil society leader in Ituri, reported that 14 people were killed in the attacks, which took place in the villages of Saboko and Bialee.
Irumu territory in Ituri province is near Beni in neighbouring Nord Kivu province - the main target of attacks where the ADF are alleged to have massacred around 700 people, many of them hacked to death. The ADF has not claimed any of the Beni massacres. Experts on DR Congo have not found any link between the group and the global jihadist underground.
Others have alleged that government agents have had a role in the killing - claims Kinshasa rejects.
Copyright Agence France-Presse, 2017