berlin german chancellor angela merkel japanese prime minister speak telephone tuesday agree sanction pyongyang step response north korea nuclear test spokesman german government say agree prime minister abe north korea late nuclear test threaten security entire world massive violation u.n. security council resolution must result resolute reaction international community well tough sanction spokesman steffen seibert say merkel abe agree increase pressure north korea make pyongyang will agree peaceful solution china russia key role play seibert add merkel abe agree sanction north korea step