Australia's Prime Minister Kevin Rudd vowed to spare no effort in hunting down the "cold-blooded" Jakarta bombers as mourners held an emotional service for one of the country's three victims Friday.
Rudd said Australia would spend as long as needed helping Indonesia search for those responsible for twin blasts at luxury hotels, which left seven dead on July 17.
"Let me say very clearly on that, we, the Australian government, will spare absolutely no effort in working with Indonesia to track down these murderers," Rudd told commercial radio.
"These are cold-blooded murderers, and I don't care how long it takes, they've murdered our people, we intend, with Indonesia, to track them down, and help bring them to justice."
Rudd was speaking as more than 400 people gathered at Canberra's Parliament House to remember trade official Craig Senger, 35, who was killed along with fellow Australians Nathan Verity and Garth McEvoy at the JW Marriott hotel.
Foreign Minister Stephen Smith, Trade Minister Simon Crean and Governor-General Quentin Bryce were among the mourners. Private ceremonies were held for Verity and McEvoy earlier in the week.
Almost 100 Australians have died in militant attacks against Western targets in Indonesia in recent years, including bombings on the resort island of Bali in 2002 and 2005.
Its Jakarta embassy was hit by a car bomb in 2004, killing nine. Rudd said Senger was Australia's first civilian official to be killed by an extremist attack in the line of duty.