A tribal conflict erupted on 16–17 December 2018 at Yumbi in Mai-Ndombe Province, 400 km (250 miles) north of Kinshasa. Nearly 900 Banunu people from four villages were slaughtered by members of the Batende community in a deep-rooted rivalry over monthly tribal duties, land, fields and water resources. Some 100 Banunus fled to Moniende island in the Congo River, and another 16,000 to Makotimpoko District in the Republic of Congo. Military-style tactics were employed in the bloodbath, and some assailants were clothed in army uniforms. Local authorities and elements within the security forces were suspected of lending them support.