A Melbourne man who traded his party lifestyle to fight with ISIL in Syria has reportedly been killed.

Mahmoud Abdullatif left his Coburg home in the second half of last year to join the terror group in Syria.

Friends said Abdullatif enjoyed rave parties and chasing girls before swiftly becoming radicalised and promoting ISIL online.

Abdullatif tweeted this image of children posing with an assault rifle. (Supplied) (Supplied)

Melbourne woman Zehra Duman, 21, followed him to Syria and the pair announced their marriage on Twitter on December 11 with the hashtag #TheIslamicState.

Duman and another ISIL member posted claims of his death last night online, according to News Corp .

The family of Zehra Duman say she was brainwashed and they are working with authorities to bring her home. (Supplied) (Supplied)

Terror expert Charles Lister, a Visiting Fellow at the Brookings Doha Center in Qatar, also tweeted the report this morning.

There were no details available about where and how Abdullatif was killed.

In November last year he was reported to be in the ISIL-controlled town of Manbej, near Aleppo.

After moving to Syria Abdullatif posted images online of himself and young children holding weapons.

His uncle by marriage is Hany Taha, who was linked with a 2005 plot to blow up the MCG and other targets across Melbourne and Sydney masterminded by convicted terrorist Abdul Nacer Benbrika.

Mr Taha was acquitted at trial.

A spokesperson for the Department of Foreign Affairs and Trade could not confirm whether Abdullatif has been killed as there was no longer consular assistance in Iraq or Syria due to the "extremely dangerous security situation" in the region.

"Reports such as this are a reminder to would-be foreign terrorist fighters that Australians joining terrorist groups such as ISIL are being exploited," the spokesperson said, adding those involved in conflicts there are "only add to the suffering in Syria and Iraq, and are putting their own lives in mortal danger".

The Attorney General's Department would not confirm whether Abdullatif had been killed, stating it was longstanding practice not to comment on specific security or intelligence matters.

A spokesperson for the department said at least 20 have been killed in the conflict in Syria and Iraq but details surrounding the deaths were limited.

"We know there are some young Australians and others who think they've made the right choice in becoming involved in overseas conflicts, but that choice only adds to the suffering in Syria and Iraq — and it's putting those young Australians themselves in mortal danger," the spokesperson said.