A total of 687 lawmakers have been elected to the country's parliament as a result of the vote, in which the turnout made 99.99 percent, with all the nominees securing 100 percent of the vote in their constituencies, according to the North's official KCNA news agency.
Kim Yo-jong is the deputy chief of the agitation and propaganda department of the Central Committee of the Korean Workers' Party. She attended the opening ceremony of the 2018 winter Olympics in Pyeongchang, and also accompanied her brother during talks with US President Donald Trump in Vietnam at the end of February.
READ MORE: Like a Shadow: WATCH Kim Jong-un's Sister Creep Behind Kim and Trump
Whatever the reason might be, it does not entail Kim losing his power, the news agency added. The South Korean media report hasn't yet been confirmed by neither Pyongyang, not North's state media.