DR Congo launches operation against Rwandan Hutu rebels
The Democratic Republic of the Congo has launched an attack against Rwandan Hutu rebels in the east of the country, the BBC reported.
Ministers had previously pledged to target the FDLR militants after they failed to meet a deadline to disarm last month.
Hutu rebels were involved in the 1994 Rwandan genocide.
UN peacekeepers in DR Congo withdrew an offer to support the operation because two government generals are suspected of human rights abuses.
Tuesday's attack took place in the eastern South Kivu province, about 10km (six miles) from the border with Burundi, the military said.
Speaking as army chiefs launched their assault, the outgoing US special envoy to the region said the government "owes it to its people" to end the threat posed by Rwandan Hutu rebels, reported the AFP news agency.
Russ Feingold said extinguishing the threat was an "international responsibility," according to the agency.
The presence of hundreds of Hutu rebels in eastern DR Congo has been a source of instability for the country.
Many of the rebels were involved in the 1994 Rwandan genocide, in which 800,000 people - mainly from the Tutsi minority - were killed.
A Tutsi-led government subsequently took power in Rwanda, while Hutu rebel leaders fled across the border into DR Congo.
Their presence has been used by the Rwandan government as a reason for military interventions against its neighbour.