Mustapha Adam, a zookeeper at the Gamji Gate amusement park, died from injuries inflicted by a lion which attack his neck.
The big cat has been lured back to its cage after a break-out according to many reports.
BBC Africa confirmed that a similar occurrence happened at Ibadan, Oyo State, in September 2017. A lion reportedly killed its caregiver while being fed.
Much earlier, another lion escape from its confinement located in the central city of Jos but residents came to no harm.
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The animal was quickly tranquilized and killed before it could confront civilians.
The frequent events suggest a need to improve on the safety standards at wildlife parks, one of the income generators in Nigeria's vast land where tourism has become a mainstay.