As the hours run down for Andrew Chan and Myuran Sukumaran, condemned to death by firing squad, their families have made an emotional appeal to the Indonesian president, begging him to give the two men a second chance at life.
Diplomatic efforts have also intensified, with Prime Minister Tony Abbott again making a personal appeal to Joko Widodo to grant an 11th-hour reprieve the two men, in a letter sent to the Indonesian president at the weekend.
The prime minister on Sunday also warned of a tough response if Indonesia goes ahead with the executions, saying millions of Australians are "sickened" by the prospect Chan, 31, and Sukumaran, 33, could be killed this week.
Despite Mr Joko's continued insistence he will not be swayed, Sukumaran's grandmother Edith Visvanathan has not given up hope, giving a tearful plea for mercy on Sunday as she and representatives of the Chan family accepted a petition of more than 150,000 signatures asking for clemency.
"I'm sure this time he will change his heart ... and give them time to live and do more things.
"(Otherwise) one day he will come to the prison and he will know about them. Then he will feel sorry if he kill them.
"So I beg him again and again to please forgive them and give them, both of them, a second a chance."
Damon Smith - a longtime friend of the Chans - read a statement on behalf of the family.
"A lot of people have asked how Andrew is," the statement said.
"He continues to pray.
"While there is life, there is hope. Let them live."
Chan and Sukumaran were arrested in 2005 in Bali, along with seven other Australians, as part of a heroin trafficking plot.
Matthew Goldberg, co-founder of the Mercy Campaign and organiser of the petition, maintains it's not too late to for the pair.
"They're clearly in the most precarious, urgent, pressing scenario," he said.
"I don't accept that it's time limited. There's every capacity still for the Indonesian government, for President Widodo himself or through the courts for there to be a delay in the proceedings."
The comments came as the prime minister warned of a tough diplomatic response if Indonesia carries out the executions, although he refused to say if Australia's ambassador would be recalled.
"If these executions go ahead, and I hope they don't, we will certainly be finding ways to make our displeasure felt," Mr Abbott told Network Ten.
Brazil and The Netherlands recalled their ambassadors in protest at executions of their citizens in January.
In western Sydney on Sunday, Mr Abbott accused the Indonesian government of hypocrisy for trying to save its citizens on death row in other countries for drug trafficking while rejecting pleas from Australia.
"It certainly believes that the death penalty should not apply to its citizens abroad," Mr Abbott said.
"If it's right for Indonesia to ask and expect some kind of clemency, it's surely right for us to ask and expect some kind of clemency."
Ban Ki-moon, the UN secretary general, has also joined calls for an 11th-hour reprieve for the two men.
Ban spoke with the Indonesian foreign minister, Retno Marsudi, on Thursday to express his concern at the recent application for capital punishment in Indonesia.
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