ATTACKERS slit the throats of three North Korean doctors, killing them in an apartment in north-eastern Nigeria.
The unknown attackers ransacked the doctors' apartment in Potiskum, Yobe state, after the attacks.
It was unclear who carried out the killings. Potiskum has been frequently targeted by Islamist sect Boko Haram, a group that killed hundreds last year in its effort to carve out an Islamic state in Nigeria's mostly Muslim north. But there could also be a criminal motive as foreign workers are associated with wealth. Western embassies consider north-eastern states "red zones" and advise their nationals not to travel there.