The government admits it buried more than 400 corpses at night in Kinshasa on March 19, but claims they were stillborn fetuses and unclaimed remains from the morgue.
Gen. Bruno Mandevu was appointed to head an army operation against FDLR rebels, but just five days later was accused of committing 121 rights abuses, including allegations of rape and summary executions.
Violence continues in Kinshasa as civilians protest a controversial bill that would delay an election until a national census and extend President Joseph Kabila's term.
A series of gruesome attacks on civilians in the DRC's volatile North Kivu province are believed to be the work of Islamist militants from neighboring Uganda.
The Democratic Republic of the Congo announced that rebel leader Banaloki "Cobra" Matata plans to surrender, along with "a significant number of his fighters."