Criminal groups and extreme violence in the northwestern Nigerian state of Zamfara has caused hundreds of thousands of people to flee their villages and seek shelter in the town of Anka.
Nigeria: Saving lives in a three-wheeled ambulance
Around the world, three-wheelers offer a cheap means of urban transport.
In Gwoza, northeast Nigeria, the small three-wheeled vehicles known locally as keke napeps are more than just a means of public transport, they are a means of saving lives.
Every month around 260 patients are transported to the hospital in keke napeps, which are used as makeshift ambulances.