The group includes five expatriate and two Nigerian contractors working for Macmahon Holdings ' United Cement Company plant in the Akpabuyo district .
The group was escorted by a security pickup that reportedly had four armed policemen .
The group , which was escorted by a security pickup that reportedly had four armed policemen , includes five expatriate and two Nigerian contractors working for Macmahon Holdings ' United Cement Company plant in the Akpabuyo district .