EXO's D.O. was caught using an e-cigarette while waiting for a music program.

EXO's D.O. is the most recent K-Pop idol allegedly implicated in an e-cigarette controversy. E-cigarettes have recently been a contentious issue in the business.

Online fans claim that the EXO member has lately been seen in one of the group's behind-the-scenes videos emitting what seems to be smoke from his mouth and nose. Internet users speculated that D.O. was adjusting his stage attire while smoking an e-cigarette in the waiting area of a music event.