AN ISLAMIC State recruit unmasked as a Melbourne teenager has made taunts on Twitter threatening terrorist attacks would make the 9/11 look like “child’s play”.

The boy, dubbed the “white jihadi” after featuring in IS propaganda videos, was previously believed to be British, but was yesterday identified as 18-year-old Jake Bilardi from Craigieburn in Melbourne.

The teenager, a gifted student turned high school dropout reportedly lured by the death cult searching for answers after losing his mother, has been making threats online under an Islamic pseudonym, The Australian reports.

Before his profile was suspended yesterday, he had tweeted about impending attacks.

“What we have in store for you dogs will make 9/11 look like child’s play,” he wrote yesterday.

In a previous post, the teen has reportedly warned: “Martin place was just the beginning for you dogs.”

The Australian also reports he has boasted online of meeting one of Islamic State’s highest ranked leaders, Shaker Waheeb al-Fahdawi.

Bilardi is believed to have converted to Islam last year, surprising friends and neighbours.

Neighbours have described the boy to the Herald Sunas “shy” and “a confused boy”.

The teenager was reportedly living with two older brothers and a sister after his mother died several years ago from cancer.

He is understood to have changed schools last year before dropping out and fleeing to fight in Iraq and Syria.

Bilardi was seen pictured last year in a picture posted to Twitter holding a gun and standing in front of an IS flag backdrop with two extremists.