1. All jihadi groups are using drones and studying how they work and how to avoid them.

2. The two jihadi groups are fierce rivals, divided over leadership and ideology.

3. Government officials have declared victory prematurely in the past against the brutal jihadi group.

4. Developing chemical weapons has been an ambition of the group and various other jihadi movements for years.

5. It cited reports circulating on jihadi social media accounts.