Kim Yo-jong, sister of Kim Jong-un, issues warning after inspecting border fortifications against backdrop of rising tensions

Propaganda loudspeakers aimed at South Korea will be ready to restart within days along the entire border, Kim Yo-jong, the powerful sister of North Korean leader Kim Jong-un, has said amid a worsening of ties between the two countries.

The statement, carried by the state news agency KCNA on Thursday, came a day after she said the loudspeakers would be in operation along the whole border from some time in October.

Bukang-i successfully guided out after month in which it drew 1.6m visitors and was watched over by YouTubers

In South Korea, they call them jagyeongdan, a word whose meaning sits somewhere between vigilante group and neighbourhood watch. Each night they put on hi-vis vests, picked up their selfie sticks and gathered around the harbour in Busan to keep watch over an unlikely charge: a stranded shark affectionately known as Bukang-i.

On Wednesday, after more than a month in the canal and at the third attempt, the shark was successfully guided out, South Korea’s oceans ministry said. Officials expect her to move into open water in time.