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 female suicide bomber just like the first.
“One female suicide bomber about 18yrs died, 6 persons injured,” the police announced.
There is panic across the city and sorrow is etched on the faces of residents, our correspondent says.