In the last few years, powerful criminal gangs have terrorised a swathe of north west and central Nigeria. From camps in the forest, gangs of bandits on motorbikes have attacked villages killing and kidnapping men, women and children. So how can Nigeria's new leader restore security? What does it say about the future of security in Africa's most populous nation? Alex Last has been to the north western city of Katsina to meet some of those battling the bandits.

Photo: Some of the weapons used by vigilantes in Zamfara state, north west Nigeria, 2019 (Photo by Kola Sulaimon / AFP via Getty Images)

Reporter: Alex Last