The ex-girlfriend of North Korean leader Kim Jong-un was among several performers put to death on pornography allegations, a South Korean newspaper said.
South Korean newspaper Chosn Ilbo reported that Hyon Song-wol and other performers were put to death by firing squad.
They were accused of selling sex tapes of themselves and some of them allegedly possessed bibles, which is a political crime in the repressive state.
File footage from North Korea's state TV showed a woman believed to be Hyon standing behind Kim Jong-un and his wife at a concert in July 2012.
The South Korean newspaper said Kim and Hyon met about 10 years ago, but his father, Kim Jong-il, disapproved of their relationship and ordered it to end.