Police in Hunan province are investigating a 63-year-old man who allegedly used his single room in a hospital to deal drugs since early last year, Xiaoxiang Morning Herald reported on Wednesday.

The man allegedly hid crystal meth, heroin and "magu", a stimulant consisting of meth and caffeine, in his room, and sold them to buyers disguised as visitors while undergoing treatment for emphysema in a hospital in Anxiang county, according to police.

Police caught three drug addicts in the ward on Monday and Tuesday.

Zhu Fangjie contributed to this story.