"Militants linked to the Islamic State group...used a donkey strapped with explosives to ambush the convoy of the governor of Nigeria's north-eastern Borno state"

BBC:

When soldiers saw the donkey on the road, they shot at it. Explosives then went off and the militants immediately came out from their hide-out to open fire on the convoy, an official who was in one of the vehicles in Governor Zulum's convoy told the BBC.

A number of insurgents were killed in the ensuing shoot-out. No-one in the convoy - including the governor - was injured but some vehicles were damaged by bullets, the official said.