A female suicide bomber has blown herself up in a college campus in northern Nigeria's biggest city of Kano, killing three people and critically wounding another seven.

It was the third female suicide attack this week in Nigeria. Authorities arrested a 10-year-old girl with explosives strapped to her chest on the same day.

Al Jazeera's Rawya Rageh reports from Kano on growing fear among Nigerians about attacks by women suicide bombers.