The casualty figure in the Zaria bomb explosion has risen from 20 to 25, the Kaduna state government has said.
Governor Nasir El-Rufai had reported the killing of 20 persons moments after the incident.
But in an official statement issued about an hour after the explosion, the spokesperson for Mr. El-Rufai, Samuel Aruwan, said 25 people, including a two-year-old died.
Mr. Aruwan said 32 others were injured and were being treated at the Ahmadu Bello University Teaching Hospital, Zaria.
The Zaria attack came hours after a suicide bomb attack at a Mosque in Kano on Monday.
Similar explosions killed 44 people in Jos, Plateau State, on Sunday, the same day six persons were killed at a church in Potiskum, Yobe State, by a suicide bomber.