Many people have reportedly lost their lives in suicide attacks in Mubi, a town in Adamawa state.
"Several others were injured and have been evacuated to the hospital".
"The mosque roof was blown off and the prayer was midway when the bomber, who was obviously in the congregation, detonated his explosives", Danladi said.
A resident, Muhammad Hamidu, said: "I took part in the burial of 68 people".
The violence has killed about 20,000 people and displaced more than two million.
Haruna Hamman Furo, the head of the Adamawa state emergency management agency, described the attack as "devastating".More news: Tristan Thompson breaks Instagram silence amid cheating scandal
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The jihadist group on Thursday carried out an attack in Maiduguri, capital of neighbouring Borno state, that killed four people.
Nigeria's government and military have long maintained that Daesh group affiliate is a spent force and on the verge of defeat.
This is the second attack at a mosque in Mubi in six months, AP reported.
Nigerian President Muhammadu Buhari has been in the United States this week and met his USA counterpart Donald Trump, who pledged more support in the fight against Boko Haram.
"This is obviously the work of Boko Haram".
The insurgents briefly overran Mubi in late 2014 as they rampaged across North-east Nigeria, seizing towns and villages in a quest to establish an Islamic state. At least 15 people were killed and 83 injured when militants descended on the city in early April.