Nigerian troops discovered a Boko Haram bomb factory this week after they seized a northern town from the extremists, the military said.
The factory was tucked inside a fertilizer company in Buni Yadi town in Yobe state, according to officials.
Islamist fighters took over the town in August, one of many seized in the troubled northeast. Troops have battled the militants for months to regain control, and said they recaptured it last week.
Militants planted explosive devices along the highway on their way out, which delayed the soldiers’ advance. Four soldiers were killed during the operation.