The head of the independent inquiry into Australian cycling's drugs scandal interviewed several key figures in the investigation.

Retired West Australian supreme court judge Robert Anderson QC returned to Canberra after attending a pre-Olympic track camp in Rockhampton, Queensland.

There he interviewed former world champions Shane Kelly, Ryan Bayley and Jobie Dajka, current world champion Anna Meares and national track cycling coach Martin Barras.

Anderson must report to the federal government on Thursday, with the Australian Olympic cycling team to be finalised on July 9.

The judge has already spoken to four-time former junior world champion Mark French, the disgraced rider at the centre of the controversy.

It is understood Anderson will wrap up his interviews Wednesday morning when he speaks to Cycling Australia team doctor Peter Barnes by telephone.

French implicated Kelly, Dajka and fellow former world champions Sean Eadie, Graeme Brown and Brett Lancaster in the scandal earlier this month at his drugs hearing.

French alleged the five riders had injected themselves with substances he understood to be legal in his room at the Australian Institute of Sport's Del Monte residence in Adelaide.

The Australian Olympic Committee (AOC) will only confirm riders' selections for Athens if it is satisfied they are clean.

The five cyclists French named are strong Games contenders.

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