Defectors have flown balloons over North Korea with messages from the 'free world', cash, USB drives and SD cards amid claims Kim Jong-un is dead.
Members of a group called Fighters for a Free North Korea released 20 balloons carrying 500,000 leaflets announcing that two high-profile defectors had won seats in South Korea's parliament.
In a new interview, one of the defectors, Ji Seong-ho, said he is "99 per cent" sure that Kim is dead and that the dictator's sister will take control of the country.
The balloons were released in Incheon, close to the border, on Thursday night in the hope that the contents will reach villagers in the North and the messages will spread through the secretive and isolated country.