The attack on the Grand Mosque in the Nigerian city of Kano that killed 120 people was the single deadliest incident.

The BBC study with International Centre for the Study of Radicalisation – records a total of 664 attacks in 14 countries.

Four fifths of these were in Iraq, Nigeria, Afghanistan and Syria.

The investigation records nearly seven people died every hour in November as a result of violence attributed to al-Qaeda, its offshoots and groups that subscribe to a similar ideology.

Sixty per cent of jihadist deaths were caused by groups that have no formal association with al-Qaeda.

They are expected to be the ones who will eventually vie for leadership of the movement.

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