T.O.P
T.O.P smoking a cigarette T.O.P's Instagram

Reeling from his drug scandal that shook the Korean entertainment industry, Big Bang's T.O.P issued a handwritten public apology for smoking and using marijuana, an illegal drug in South Korea.

YG Entertainment tweeted T.O.P's apology that says he does not have any excuse for his wrongdoing.

"First of all, I would like to sincerely apologize for causing great disappointment and disturbance with a huge wrongdoing. I am too ashamed of myself to stand in front of everyone for an apology. I have no excuses and feel very regretful and fearful, so I am carefully writing down these feelings as words," wrote T.O.P, who is ironically serving as a conscripted police officer for his military service at the Gangnam Police Station in Seoul, South Korea.

T.O.P was busted by police after his hair sample found to be positive for marijuana, a banned substance that could land him in jail for up to five years or a fine of up to 50 million won (US$44,667).

"Our members, my agency, the public. My fans who have supported me, and my family, I have left an irreparable scar in everyone's hearts, so I believe I deserve to be punished," he said, according to Soompi.

The singer said he is ashamed of what he has done.

"My heart aches, and I am also very ashamed of myself. I will meditate and reflect on [my mistake] again and again. I will never make such an irresponsible mistake again. Once more, I apologize for not being able to apologize to everyone personally. I will deeply repent my wrongdoing. I am very ashamed of myself. I apologize," he added.

His case has been turned over to government prosecutors by the police. The drug case stemmed from the investigation of singer-trainee Han So-hee, who confessed that she smoked liquid marijuana with T.O.P at his home in the affluent area of Yongsan, Seoul last October.

Korean police are saying that T.O.P used marijuana at his home three times between October 9 and 12 with the trainee.

Meanwhile, G-Dragon apologized for T.O.P's act.

"[We are] sorry for causing a disturbance. We will make sure something like this does not happen again. Please continue to support us," said G-Dragon, as Soompi reported, at the Big Bang fan meeting in Osaka, Japan on June 3.

Like T.O.P, G-Dragon was busted for using marijuana in October 2011 and issued a public apology two months later.