SINGAPORE - A man targeted in a failed murder plot had an affair with the wife of the alleged mastermind of the conspiracy, a court heard on Tuesday.

Singapore permanent resident Aye Maung Maung Thet, 28, was allegedly tasered by two men in a multi-storey carpark in Pasir Ris last month, but managed to attract the attention of passers-by. His attackers fled before the grisly killing could be carried out.

Win Kyaw Kyaw Aung, 29, is believed to have been behind a plot to murder the engineer on June 20. He has since fled the country.

Myanmar nationals Yae Wynnt Oaung, 32, and Phyo Min Naing, 32, and Singapore PR Zaw Min Hlaing, 37, have been charged with scheming with Aung to murder Mr Thet.

The deed was supposed to have been carried out at Aloha Changi chalet where an assortment of items were recovered. They included a meat mincer, a chainsaw, trolley bags, plastic sheets, cable ties, a cleaver and a chopping board.

Applying for bail on Tuesday, Oaung's lawyer S.S. Dhillon said his client is a cousin of Aung and regularly travelled to Singapore to conduct business dealings for him.

He said Oaung had not been involved in communications that Aung had with the other two accused on how to deal with his wife's alleged affair, nor had he been present at the carpark.

Mr Dhillon said his client has since contracted tuberculosis.

Opposing bail, Deputy Public Prosecutor John Lu said Aung could resurrect their plan should any of the accused be given bail.

"This is a risk that this court cannot take," he added. "An innocent man's life is at stake ."

District Judge Eddy Tham will decide whether to grant bail on Wednesday.