SYDNEY: An 18-year-old Australian man was behind a deadly suicide bomb attack in Iraq last week, authorities said Monday, with Attorney-General George Brandis calling it a “disturbing development.”

The blast last Thursday near a mosque in Baghdad left several dead, including the teenager, who left Melbourne for the region last year.

Reports said the Islamic State militant group named him as Abu Bakr Al-Australi on an affiliated Twitter feed, with Brandis’ office confirming he was Australian.

“This is a disturbing development and is a further example of the dangerous and volatile situation in Iraq at present,” Brandis said in a statement.