Australia and Papua New Guinea are set to sign a landmark security deal that will bring their defence forces much closer together.

Anthony Albanese and a delegation of senior ministers will visit Port Moresby this week as PNG prepares to mark 50 years of independence.

Ahead of the Golden Jubilee celebrations, the prime minister described PNG as a close neighbour and true friend.

"Ties between our nations run deep, and over the past 50 years our friendship has continued to evolve and mature," he said on Sunday.

"Australia and Papua New Guinea have a special relationship based on shared values and a vision for a stable and prosperous Pacific region."

Negotiations on the defence deal started in June and it is expected to be signed off on Monday.

Citizens of the neighbouring Pacific nati

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