BTS, (G)I-DLE and LE SSERAFIM, have denied any rumours of links to a recent spate of drug-related investigations in the Korean entertainment industry.In the past week, popular South Korean actor Lee Sun-kyun and Big Bang member G-Dragon were booked on suspicion of drug use. The two cases are said to be unrelated to one another.Soon after the news broke, rumours that other high-profile K-pop stars were also being investigated for drug use started circulating online, according to SBS Star.Among them were LE SSERAFIM’s Kim Chaewon, (G)I-DLE’s Jeon Soyeon and K-pop boyband BTS.