G-Dragon has tested negative in a drug test of fingernails and toenails, according to local reports on Tuesday.

The 35-year-old singer, whose real name is Kwon Ji-yong, gave samples to the Incheon Nonhyun Police Station earlier this month. They were then sent to the National Forensic Service.

Drug tests conducted on G-Dragon's hair on Monday came out negative as well. The singer also tested negative in a rapid urine test earlier this month.

Those results, in combination, mean that the singer has likely not used drugs for up to a year, as hair tests have the furthest-back detection period. Fingernail tests can identify use from as long ago as six months.

G-Dragon has been suspected of illegal drug use after a 29-year-old woman who is a manager of an adult entertainment establishment in Gangnam District, southern Seoul, told police that the actor had taken drugs in her workplace.

But police have been unable to acquire evidence beyond that statement, according to reports.

BY SHIN MIN-HEE [shin.minhee@joongang.co.kr]