Ex-world champion cyclist Jobie Dajka has been found dead at his home, Australia's Nine TV network reported late Tuesday.

Nine reported in a late night news bulletin that the 27-year-old Dajka was dead but did not give details.

The South Australia state police media unit and Cycling Australia did not immediately respond to calls.

In 2002, Dajka won a Commonwealth Games gold medal in the team sprint and won the keirin at the world championships.

His career was derailed the following year when he was cut from the Australia's team for the Athens Olympics for lying to a doping inquiry.

He was among five former world champions under investigation after former track squad member Mark French received a two-year ban in 2004 from all competition and a lifetime ban from the Olympics for doping offenses.

In 2005, he was found guilty of assaulting Australia's head track cycling coach and given a three-month jail term that was suspended provided he did not breach certain conditions.

He was subsequently barred from professional cycling for three years but successfully applied to be readmitted to competition after 12 months.