Churches in predominantly Muslim northern Nigeria, Africa, are now being fitted with metal detectors because of threats of bomb attacks.

Worshippers in Christian churches are also having their bags and persons searched over fears of explosives being smuggled inside.

Nigerians, who traditionally give gifts frequently, are being warned that the gifts, too, can be rigged to explode.

The unusual measures were precipitated by several bombing attacks against churches in the region attributed to the radical Islamic group Boko Haram.

Boko Haram says it is fighting for Islamic rule.

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