The Nigeria Police say a second explosion has rocked the ancient city of Kano.
The police announced the fresh explosion via its twitter handle.
The explosion came less than five hours after a blast tore through the Hotoro area of the city, killing no fewer than five persons.
The police say the second explosion was also detonated by a suicide bomber just like the first.
The number of casualty as well as other details are unavailable at this time.
There is panic across the city and sorrow is etched on the faces of residents, our correspondent say.