Dozens of people have been killed in attacks carried out by suspected Islamists on villages in northern Nigeria.
Local residents say fighters from Boko Haram spent six hours killing people and torching homes in two villages in northeastern Borno state.
The raids on Saturday morning were close to Chibok, from where more than 200 schoolgirls were abducted in April.
Villagers said fighters wearing military uniforms chased fleeing residents into the attack on Kwarangilam and Koronginim villages. The victims are said to include members of a civilian defence force.
Ground troops backed by air support were later deployed to the area.
Nigeria's government has been facing growing pressure both at home and abroad to do more to tackle Boko Haram since the militants' kidnapping of the Chibok schoolgirls.
Hundreds of villagers have been killed in northern Nigeria in Boko Haram attacks in recent months.
Militants have frequently targeted remote areas since emergency rule was imposed a year ago in the north-east.