The Kuje Medium Custodial Centre came under attack by terrorists last night.
It was learnt that the first explosion, a high-capacity bomb, went off around 10.25pm.
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Some accounts said it was followed by the second and third blast and sporadic gunshots.
A security report had alerted the officials to possible attacks on the facility.
One of the workers at the facility who confirmed the attack in a chat said the attackers had come from the back of the centre.
