Haukur traveled to Syria in 2017 and joined an anarchist unit of the International Freedom Battalion called Revolutionary Union for Internationalist Solidarity (RUIS) alongside the YPG. He participated in the liberation of Raqqa that same year. On March 6, 2018, Turkish media reported that Haukur had been killed in a Turkish airstrike in Afrin on February 24. As of this writing, early June 2018, the news remain unverified and Haukur's body has not been retrieved.