LAGOS, March 28 (Xinhua) -- A group of gunmen bombed a rail track in Nigeria's northwestern state of Kaduna on Monday, with casualties unknown, witnesses and security sources said.
Hundreds of passengers were on board the train connecting Abuja, Nigeria's capital, the source said.
This came a few days after a group of gunmen attacked the Kaduna International Airport.
Neither the state government nor the police confirmed the accident. ■