benghazi libya four foreign engineer work turkish construction firm enka kidnap southwest libya friday libyan state electricity official say men turkish south african seize travel airport town ubari power plant help build official say ask name immediate indication abduct statement website enka refer three turkish citizens kidnap around midday today libya three citizens two personnel temporarily work country kidnap unidentified people travel outside build site statement say company follow subject closely contact turkish libyan authorities add kidnap rife across libya turmoil since uprise unseat autocratic leader muammar gaddafi 2011. work ubari plant go years disrupt periodically tribal clash security problems four foreigners work power plant kidnap libya official say