South Korea's first Olympic swimming gold medallist Park Tae-hwan has failed a doping test, his agency has confirmed.
The test was administered by global swimming body Fina before the Asian Games in September in Incheon, the Korea Swimming Federation said.
Park's management has attributed the failed test to an injection for chiropractic treatment.
Park, nicknamed "Marine Boy", is a celebrated figure in South Korea.
He won gold and silver medals at the past two Olympic Games, and even has an aquatic arena named after him.