Australian Prime Minister Malcolm Turnbull has made an unannounced visit to Australian troops serving in Iraq and Afghanistan ahead of Anzac day commemorations.

"The Prime Minister meeting and thanking Australian Defence Force mentors and force protection at Qargha, Afghanistan," the official account of his office tweeted early this morning.

Australia has 270 defence personnel deployed mostly in the capital Kabul, where they provide support and security along with some mentoring recruits at the Afghan National Military Academy.

Since 2002, 42 Australian troops have been killed in Afghanistan and two in Iraq.

During his visit on Sunday and Monday, Mr Turnbull paid tribute to their sacrifice and to commemorate Anzac day with them.

He also took the opportunity to assess the progress of the wars in Iraq, Syria and Afghanistan, by meeting with Iraqi Prime Minister Haider Al-Abadi in Baghdad and Afghan Ashraf President Ghani in Kabul.