Australia has pushed through intense heat and humidity for a punishing three-hour training session in preparation for Thursday's opening practice match against a local side.

Ricky Ponting's 14-man squad will have another practice match on Sunday ahead of its opening Champions Trophy Group A clash with a qualifying team on October 18.

The Australians trained in centre-wicket nets on the Cricket Club of India (CCI) Ground in Mumbai amid tight security after last week's British newspaper report of a plot by the London bombers to kill players from both sides by releasing a deadly nerve gas in the change rooms during the Edgbaston Test in last year's Ashes series.

Adding to security concerns, Mumbai was the scene of a train blast earlier this year. Sixteen people are accused of exploding seven bombs on commuter trains on July 11, killing more than 200 people.

But with experienced security expert Reg Dickason travelling with the team, the Australian players have already put last week's terror plot shock behind them.

The World Cup champions are yet to announce a lineup for Thursday's practice match, which is due to start at 9.30am local time (2pm AEST) at the nearby Wankhede Stadium.

Australia's second practice match on Sunday is also at Wankhede Stadium, but the Group A opener on October 18, against either West Indies or Sri Lanka, will be back at CCI Ground.

The Australians are hopeful the overcast skies will clear to allow a full day's play, although left-arm swing bowler Nathan Bracken will relish the humid morning conditions if given the opportunity.

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