Jos - Two bombs exploded near a bus station in Jos on Thursday evening, witnesses said, the second one killing at least 40 people.
Casualties from the first blast could not immediately be ascertained and Nigerian security sources could not immediately be reached for comment.
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Bomb blasts that bore the hallmarks of Boko Haram militants killed 118 people in the same area of Jos in May.
"I saw a flash of light and heard a loud boom. Afterwards there was debris everywhere and mutilated bodies," witness Tanko Mohammed said of the blast in Jos's commercial Terminus district. A Reuters reporter counted 11 bodies at one bomb site and 29 at the other.