At least seven people were killed when Boko Haram jihadists attacked a camp for people displaced by the conflict in northeast Nigeria, militia members and locals said Saturday.
The attack on Friday evening in Ngala, near the border with Cameroon, came as two people were killed in an explosion outside another camp in Borno state capital, Maiduguri.
In Ngala, a civilian militia member, Umar Kachalla, said jihadists in two pick-up trucks fired a rocket-propelled grenade at the camp, which houses some 80,000 people.
The camp in Ngala was set up in January last year after the return of thousands of Nigerian refugees from Cameroon, where they had fled the fighting.
Boko Haram seized the trading hubs Ngala and neighbouring Gamboru in August 2014 when it took over a swathe of territory across Borno state and the wider northeast.
Nigerian troops retook both towns in September 2015 with the help of Chadian forces.
However, Boko Haram fighters still launch sporadic attacks, laying ambush to troops and vehicles as well as attacking and abducting farmers.