The killing of three people at a church in France has focused attention on extremism in the suspected attacker’s native Tunisia, where political instability has hobbled efforts to tackle radicalisation.

It is unclear where Brahim Aouissaoui was radicalised in Tunisia, and also whether he planned last week’s deadly attack at the Nice church before or after his arrival in Europe in late September.

But the attack was a reminder that, despite improvements in security since a string of deadly jihadist operations in 2015, extremist groups continue to recruit and indoctrinate young Tunisians.