Super Junior’s Heechul, fans file police complaint against trolls, and K-pop star says ‘there will be no mercy’ for online comments

• K-pop star Kim Hee-chul posted message on his Instagram after filing police complaint, saying, ‘I will track down as many people as possible in the coming days’
• The Super Junior singer, with the help of his fans, says he has collected ‘tens of thousands of negative comments’ over the course of three months