The Nigerian military says two leading officials from the militant group - Islamic State West Africa Province - have been killed in air strikes in the north-east of the country.
Local media have named Ali Kwaya and Bukar Mainoka as the two commanders killed, saying they were senior members of the extremist group's Shura Council.
Additional air strikes hit vehicles attempting to carry around a dozen injured jihadists to a hideout.
The operation follows new US and British security warnings of impending militant attacks in Nigeria's capital, Abuja.