"Three North Korean doctors have been killed in a pre-dawn attack in Nigeria's northeastern town of Potiskum, police say," but "[t]he motive of Sunday's attack was not immediately clear," Al Jazeera reports (2/10). "The deaths ... of the doctors in Potiskum, a town in Yobe state long under attack by the sect known as Boko Haram, comes after gunmen killed at least nine women administering polio vaccines in Kano, the major city of Nigeria's predominantly Muslim north," the Associated Press notes, adding, "No group has yet claimed responsibility for that attack either, though it follows alleged Boko Haram attacks now focusing on softer targets, like lightly guarded mobile phone towers."