The Rwanda-backed rebel group M23 has denied involvement in a series of massacres in eastern Congo which were detailed in a report published by a rights group Wednesday. Lawrence Kanyuka, spokesperson for the M23 military,

Human Rights Watch said 141 people, predominantly Hutus, were feared dead or missing after the attacks near Virunga National Park in North Kivu province, citing local experts and witness accounts. It said the killings appeared to be part of a military campaign by the M23 group,

M23, a rebel group backed by Rwanda, killed at least 140 people in July in the Democratic Republic of Congo, Human Rights Watch said. Most victims are Hutu.