An Iranian refugee who set fire to himself to protest Australia’s policies toward people who try to reach its shores by sea died on Friday.

The man, who was 23, was airlifted from the small island nation of Nauru to a hospital in Brisbane, Australia, where he “tragically died today from his injuries,” Australia’s Department of Immigration and Border Protection said in a statement.

The man’s name was not released, but Australian news reports have referred to him as Omid.

Australia-bound migrants who are intercepted at sea are detained in Nauru or Papua New Guinea, often for extended periods, under agreements Australia has with those countries. On Wednesday, officials from the United Nations refugee agency were visiting Nauru, where 450 men, women and children were being held, when the man set himself on fire there.

“This is how tired we are,” the man said before igniting the fire, according to witnesses quoted in news reports. “This action will prove how exhausted we are. I cannot take it anymore.”