Manhunt under way to find suspect behind non-fatal assault on underground as PM says threat level raised to critical.
Ousted Prime Minister's wife Kulsoom running for office of vacated seat in poll seen as political barometer.
About 1,200 Caloocan city officers will be relieved in batches after some were suspected in the murders of three teens.
Protests erupt in St Louis after a white former police officer is found not guilty in the fatal shooting of a black man.
KCNA says leader wants 'equilibrium' with US as Washington reiterates it has military options to deal with Pyongyang.