At least 25 people were killed when a suspected suicide bomber detonated explosives at a local government office in Zaria, northern Nigeria, on Tuesday, the state governor said.

"I am sad to confirm that an IED (improvised explosive device) most likely carried by a suicide bomber exploded in the Sabon Gari LG (local government district) and killed 25 people, including a two-year-old," Kaduna state governor Nasir El-Rufai said on Facebook.