BBC News:
At least 26 people have been killed in bombings in two major cities in northern Nigeria, emergency workers and witnesses say.
The first blast at bus rank in Gombe killed at least 20 while another six died in an explosion at a market in Bauchi, they added.
Militant Islamist group Boko Haram is waging an insurgency in the area.
Meanwhile, a video purportedly released by the group shows dozens of people being executed at a school dormitory.
