A Melbourne university student who claims to have joined the war for Islamic State says he will not return to Australia and is not afraid to die in Syria.

Roxburgh Park man Suhan Rahman has appeared in photos on social media posing with machine guns and alongside Sydney extremist Mohamed Elomar.

Chilling: Melbourne university student Suhan Rahman poses with a weapon in a social media post. Credit:Facebook.

Earlier in January Fairfax Media revealed a Melbourne a man calling himself Abu Jihad travelled with Mahmoud Abdullatif to Syria in September where they met Elomar and fellow self-proclaimed jihadist Khaled Sharrouf.

Abu Jihad has now been revealed to be 23-year-old Rahman.