Indonesia's execution of six death row inmates overnight is "dreadful news", the federal opposition says as two of the Bali Nine face the same fate.
Labor leader Bill Shorten has repeated his call for clemency for Myuran Sukumaran and Andrew Chan, Australian citizens who orchestrated a heroin smuggling operation in Indonesia in 2005.
"It is dreadful news - I and Labor do not support the death penalty," Mr Shorten told reporters in Melbourne on Sunday.
"It is greatly concerning with the news overnight of the execution of six people, some of whom were foreign citizens.
"We will work with the (Abbott) government to make sure that clemency is extended to Australians who are facing this most dreadful prospect in the coming days and weeks."
Indonesia executed six people by firing squad for drug-related crime - including five foreign nationals from Brazil, the Netherlands, Vietnam, Malawi and Nigeria.
This was despite international diplomatic pressure to not proceed with the executions.
Sukumaran has had his last-ditch bid for a presidential pardon refused while the outcome of Chan's bid remains unknown.
"No one is saying they haven't done anything wrong and no one is saying they haven't broken laws," Mr Shorten also said.
"But the death penalty is something Australia outlawed in 1984 and Labor is seeking, along with the government, clemency for these Australians."
There were no executions in Indonesia last year.
