Armed attackers kidnapped eight foreign workers in northern Nigeria on Sunday. abductees were taken from residential compound of Lebanese construction company. security guard was killed as he tried to prevent assailants from entering camp. kidnapped workers are believed to be from Britain, Greece, Italy and Lebanon. woman and her daughter are among them. local government official, Adamu Aliyu, said attack occurred at 2:15am. gunmen also attacked police station and prison on their way to compound. police chief said: "We repelled attack...but they burnt two vehicles." This attack is worst ever case of foreigners being kidnapped in north of Nigeria. Kidnappings for ransom occasionally occur in south, especially in areas that support country's oil industry. Violence in north has largely been of nature of attacking churches and police stations, and kidnapping locals. No one has yet taken responsibility for yesterday's raid, but security experts believe one of northern Nigeria's Islamist groups is behind it. Al Qaeda splinter group Ansaru has been active in recent months. larger group Boko Haram, which means 'Western education is forbidden,' has been most active in area. It is reportedly responsible for hundreds of deaths, and church bombings.