Nigeria's Air Force says a fighter jet on a bombing mission against Boko Haram crashed in the northeast, killing the pilot.

A statement Saturday blamed the crash on "bad weather and not under enemy fire" in an area where Boko Haram Islamic extremists last year shot down a military jet and beheaded its pilot.

The Chinese-built Chengdu F7 went down Friday in a rural area of Adamawa State, the statement said.

In August, a Nigerian Air Force plane crashed into a home in northern Kaduna city, killing all four crew and three passengers. In November 2014, a military helicopter exploded in the northeast, killing all three crew members. In December 2013, Boko Haram destroyed two helicopter gunships and three fighter jets in northeastern Maiduguri city.