Australia has confirmed it sent 46 asylum seekers back to Vietnam after intercepting their boat off the coast of Western Australia last month.
The government said it has now turned back 633 asylum seekers who were trying to reach Australia by boat.
In July a small wooden boat, the first "illegal" vessel entry into Australia since June 2014, was spotted off the north-west coast.
It was not seen again and the government refused to say where it was.
The government usually refuses to comment on boat turn-backs but Immigration Minister Peter Dutton on Thursday told local media: "There were 46 people on a recent venture that did come from Vietnam; we have negotiated their return to Vietnam."