Locals say militants targeted a funeral on Saturday in northeastern Borno state, epicentre of Boko Haram and Daesh insurgency.
The Multinational Joint Task Force, comprising soldiers from several African countries, says it has "inflicted the heaviest loss in six months" on Daesh in Lake Chad area.
More than 40 people were also wounded when three unidentified bombers struck in the northeast state of Borno where villagers were watching a football match on TV, officials and villagers say.
Many Nigerian women who were once married to Boko Haram fighters are navigating their trauma, though by not denying their experiences. They also want to raise their children in anonymity, hoping their true identity is never revealed.
The attack was carried out in Kareto village, 335 kilometres north of the Borno state capital Maiduguri, military officials say.
President Muhammadu Buhari starts his second four-year tenure as the country battles severe security challenges.
Police said that at least 23 people have been killed by armed bandits in Nigeria's northwestern Zamfara state.
This is nearly half the 685 kidnappings countrywide in the first quarter of the year, an average of seven per day.
A splinter group of Boko Haram that pledged allegiance to Daesh is stepping attacks in Nigeria, opening a new chapter in the country's war against terrorism.
Militia fighting Boko Haram militants release 894 children, including 106 girls, as part of 2017 deal against recruiting child combatants, UN officials say.
Army spokesman Ezindu Idima said in a statement government troops "had a fierce encounter" before thwarting the militants who came in large numbers to loot food items and other valuables.
In Zamfara state alone at least 3,000 lives have been lost to banditry in the last five years, a number that's double that of terror-related murders in the country.
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