seoul sanction unite state ally impose north korea fast move complete nuclear plan reclusive nation official kcna news agency say monday cite foreign ministry spokesman late sanction impose u.n. security council represent vicious unethical inhumane act hostility physically exterminate people dprk let alone system government spokesman say monday use north official name democratic people republic korea u.n. security council unanimously pass u.s.-drafted resolution week ago mandate tough new sanction pyongyang include ban textile import cap crude petrol supply north korea say sanction spur hasten nuclear plan