Judges at International Criminal Court (ICC) are due to give their verdict at the war crimes trial of Congolese militia leader Germain Katanga.
He is accused of being behind the 2003 massacre of more than 200 villagers in the gold-rich Ituri province of north-eastern Democratic Republic of Congo.
Other charges include sexual slavery, rape and enlisting child soldiers.
Mr Katanga, who was transferred to The Hague by the Congolese authorities in 2007, denies the allegations.
The fighting in Ituri, which broke out in 1999 and continued until 2003, started as a struggle for control of land and resources.
But it escalated into inter-ethnic war, exacerbated by the presence of Uganda troops, that killed an estimated 50,000 people.