Indonesia drug smuggling and Bali Nine executions
An Indonesian army soldier is pictured in front of Wijayapura port near the prison island of Nusa Kambangan in Cilacap, Central Java island, IndonesiaBeawiharta Beawiharta/Reuters

Indonesia is determined to execute the Bali Nine ringleaders for drug smuggling despite last-minute efforts by Australia's Foreign Minister Julie Bishop.

Though Indonesia has not announced the exact time of the executions, they could be carried out any moment as the mandatory 72-hour notice was served over the weekend.

The two Australians, Myuran Sukumaran and Andrew Chan, were convicted in 2006 of drug smuggling in Indonesia along with seven others.

Despite hectic diplomatic efforts and appeals by politicians from Australia, Indonesia has refused to give in saying the domestic legal proceedings will be upheld.

The family members of the two convicts have arrived in Indonesia to bid a final goodbye before the executions. Four Nigerians, a Brazilian, a Filipino and an Indonesian are also facing the firing squad later today (28 April).

"They gave no indication that [Indonesian] President [Joko] Widodo would change his mind and grant the clemency that we have sought," Bishop told Nine Network, after Indonesia turned down her plea.

"While they are still alive, there is still hope and I will continue to advocate all throughout today. We will continue because both men have been rehabilitated. Nothing will be achieved and much will be lost if these executions go ahead," she said.

She also defended Prime Minister Tony Abbott after a video featuring several celebrities was released urging him to travel to Indonesia to save the convicts.

The convicts will be shot dead by 12 police officers, who will fire at the drug smugglers' hearts, after a commander gives the green signal.

Only three officers will fire live bullets in order to conceal the identities of the police officers who perform the execution. If the convicts are not killed by the first bullet, they will be shot in their heads, according to the execution methods followed in Indonesia.