INDONESIA has officially notified eight foreign drug convicts, including two Australian citizens - that they will be executed.

The convicts - who also come from Brazil, Nigeria and the Philippines - have been transported to the high-security prison island of Nusakambangan where they will face the firing squad along with an Indonesian prisoner, despite strident international criticism.

Frenchman Serge Atlaoui, who was expected to be among the group being put to death, will not be included because he still has an outstanding legal appeal.

The Australian government said it had been informed that the execution of its citizens, Myuran Sukumaran and Andrew Chan, was imminent.

"Today, just now, we just finished notifying every convict, nine people except for Serge," a spokesman for the attorney-general's office, Tony Spontana, reportedly said, adding it would be at least three days until the sentences are carried out.