ABUJA, Nigeria (AP) — An accident involving a boat carrying passengers on the Niger River in north-central Nigeria has killed at least 26 people, an official said Wednesday. The accident happened Tuesday in the Ibaji area of Kogi state. The passengers were mostly traders headed to a market in neighboring Edo State, said Kingsley Fanwo, the Kogi state commissioner for information. Kogi state government will work with federal agencies to improve waterway safety and prevent a repeat of such accidents, Fanwo said. At least 31 people were killed last month when an overloaded boat hit a tree trunk in the Borgu area of Niger state.