Big Bang singer T.O.P has been discharged from hospital, in the latest development of the apparent drug-use saga, Korean media reported on Friday (June 9).

The 29-year-old singer was taken to hospital on Tuesday (June 6) after a suspected drug overdose, a day after being indicted without detention on charges of smoking marijuana.

He was photographed being rolled out in a wheelchair from the intensive care unit of Ewha Womans University Medical Centre in western Seoul.

Ignoring a barrage of questions directed at him, he merely said: "I'm sorry", Yonhap news agency reported.

The singer, whose real name is Choi Seung Hyun, had begun his military service in February.

The Seoul Central District Prosecutors' Office earlier said he is suspected of smoking the drug four times with an aspiring female singer at his home in Seoul in October last year.

His military service period will be put on hold until the court delivers a verdict.

If he is sentenced to at least 18 months' jail, he will receive a dishonourable discharge from military service, Yonhap said.