Three North Korean doctors have been
killed, one of them beheaded, in northeastern Nigeria.
A gang armed with machetes is believed to have carried out the
attack on the men at their flat in Potiskum, a town in Yobe state.
Sunday's attack comes just days after gunmen on motorbikes shot
dead nine women administering polio vaccinations in Kano, a major northern
city.
The victims of the latest attack had no security guards at their
residence and travelled around the city via three-wheel taxis without a police
escort, officials said.
