His comments came as Indonesian President Joko Widodo again insisted he would not grant clemency for drug traffickers on death row.
Jakarta earlier this month executed six drug offenders, including five foreigners, sparking a diplomatic storm.
Myuran Sukumaran and Andrew Chan, the leaders of the so-called “Bali Nine“ drug-trafficking gang, were arrested in 2005 for attempting to smuggle eight kilograms (18 pounds) of heroin out of Indonesia.
Chan’s appeal for presidential clemency, typically a death row convict’s last chance to avoid the firing squad, was rejected earlier this month, removing the final hurdle to putting him to death alongside Sukumaran.
Sukumaran’s clemency appeal had been rejected earlier. Authorities had insisted that both men had to be executed together, since they committed their crimes together, and had been waiting for the result of Chan’s appeal.
However, the pair’s legal team hope to put forward a fresh judicial review of their convictions, despite the fact it is against the law to file more than one such review.