This is a separate jihad attack from the one reported [1] here; that one was in Chibok, this one was in Gamboru Ngala.

"Churches, government buildings torched in Nigeria attack," from [2] AGI, December 2 (thanks to C. Cantoni):

(AGI) - Kano (Nigeria), Dec. 2 - At least two people were killed when three churches and border posts were attacked by armed men, possibly Boko Haram militants, in Gamboru Ngala, on Nigeria's north-eastern border with Cameroon at 8:30 a.m. Local sources report that about 50 armed men shouting "Allah Akbar!" (God is great!) in cars and on motorcycles, opened fire on police officers. Immigration, customs, secret police headquarters and a building used for quarantine were set on fire. Sani Kani, a local inhabitant, said, "I saw two bodies of policemen in uniform not far from the police station. One was in the street and the other was on the seat of a van." The town of Gamboru Ngala is about 40 km from the Boko Haram stronghold of Maiduguri.