The Islamic State (ISIS/ISIL) allegedly beheaded a Melbourne teenager when he attempted to return home from Syria.

Irfaan Hussein, 19, also known as Abu Sufyan Al Australi, passed away in March. His family confirmed the information, but did not provide more details. Some believe he died in a bomb blast.

Authorities found his “international phone number in the room of one of the teens charged over the alleged Anzac Day plot.” He was also friends with Numan Haider, 18, “who was shot and killed after stabbing two police officers in Endeavor Hills in September.” The boys attended Lyndale Secondary College together. Friends and family told officials he turned to radical Islam when he visited the Al-Furqan Islamic Centre with Haider in 2013.

The Australian government believes over 70 Australians are in Iraq or Syria to fight with ISIS. In December, to curb the influx, the government banned all Australians from travelling to Syria’s Raqqa province. Officials cancelled over 75 passports and refused to issue passports to ten people. In March, the government reported they prevented over 230 would be jihadists from travelling to ISIS.

In August 2014, Australian terrorist Khaled Sharrouf posted a picture of his nine-year-old son holding a severed head. He captioned it, “That’s My Boy!”

High profile doctor Tareq Kamleh appeared in ISIS propaganda videos in April that showed him caring for infants in Raqqa, Syria. He said he was not brainwashed but is enjoying life within the terrorist group. His Australian colleagues called him a sleazeball who also dabbled in illegal medical practices, “such as using the medical records of female patients to force them into sex with him.”

Sharky Jama, 25, left a successful modeling and DJ career to join ISIS. His parents received a text message about his death in April. Australian teen Abdullah Elmir, 17, threatened Prime Minister Tony Abbott in an ISIS video in October 2014. An 18-year-old from Australia blew himself up at a Baghdad mosque in July 2014. That same month, Australian authorities arrested Musa Cerantonio, who was a major recruiter for ISIS.

Abu Ibrahim, who is believed to be an Australian national, escaped ISIS after spending six months with them. He completely approved of executing the locals for crimes. He watched a crucifixion and a young couple stoned to death for adultery. However, he left “after witnessing the horrific executions of Westerners in Syria.”