About 50 Islamist militants have been killed in north-eastern Nigeria after the military raided Boko Haram camps, army spokesman Sagir Musa has said.
Troops tracked gunmen who attacked two towns on Wednesday and Thursday, reportedly killing 20 people.
Boko Haram, which wants to create an Islamic state across Nigeria, has waged a deadly insurgency since 2009.
In May, Nigeria declared an emergency in three north-eastern states in order to battle the militants.
‘Invaded from nowhere’
“Troops pursued the terrorists to their camps and destroyed them with air support,” Lt-Col Musa said on Friday in Maiduguri – the state capital of Borno state where Boko Haram was founded.