Amnesty International on Monday accused both M23 rebels in the east of the Democratic Republic of Congo and the country’s army of using explosive weapons in densely populated areas.
The organisation insisted this must come to an end.
According to Amnesty, explosive weapons with wide-area effects have been used more than 150 times over a period of several months, killing dozens of people.
The organization explained that the attacks on civilians particularly breached international humanitarian law and were likely war crimes.
It, however, called on the International Criminal Court to investigate them.
Amnesty’s report comes as fighting has intensified between the two warring sides in the country’s eastern provinces.
According to the United Nations, the violence has displaced more than 100,000 people in the region since the start of the year.