The statement said a provisional assessment had counted 12 soldiers killed and five wounded, and cited a security source as claiming that fighters loyal to Boko Haram leader Abubakar Shekau were responsible.
Blabrine is around 20 kilometres
Diffa is home to 120,000 refugees fleeing violence in Nigeria, as well as 110,000 internally desplaced Nigerien people, according to U.N. data released this month. It has also seen flooding after heavy rains caused the Komadougou Yobe river to burst its banks, affecting at least 40,000 people, the government has said.
In recent months, ISIS has frequently claimed that fighters from its Islamic State West Africa Province affiliate have carried out attacks in Diffa.