Isis massacre in Tikrit
The men are killed by a barrage of bullets as their captors look on wielding an Isis flag in Tikrit. YouTube

A Melbourne nurse suspected of working for Islamic State (Isis) in Syria has been charged with terrorism-related offences.

Adam Brookman, 39, who was arrested on Friday night in Sydney is accused of knowingly providing support to Isis by undertaking guard duty and reconnaissance between April 2010 and August 2014.

He has also been charged with performing services with intention of supporting a person to engage in a hostile activity in a foreign state.

AFP counter-terrorism national manager Neil Gaughan said: "Matters such as this ultimately concern community safety and we make no apology in taking action against people who may bring a radicalised ideology, and potentially other skills, back to Australia."

Brookman is the first Australian man to return from Syria. He has now been extradited back to Victoria, Melbourne and now awaits his next court appearance.