Why is there an insurgency in Mozambique?

Africa Daily - A podcast by BBC World Service

They leave a trail of chaos and destruction.A group of insurgents calling themselves “al-Shabab” are waging war in northern Mozambique.They’re linked to the Islamic State group and accused of heinous crimes – including beheadings.The violence got so serious, Mozambique has even looked abroad for help.But how did this insurgency begin? And what do these militants want?Hosted by Alan Kasujja (@Kasujja on Twitter)#AfricaDaily