An Iraqi court on Sunday sentenced three French citizens to death after they were found guilty of joining the ISIL group, a court official said.
Captured in Syria by a US-backed force fighting the jihadists, they are the first French ISIL members to receive death sentences in Iraq, where they were transferred for trial.
Named as Kevin Gonot, Leonard Lopez and Salim Machou, they have 30 days to appeal.
Iraq has taken custody of thousands of jihadists repatriated in recent months from neighbouring Syria, where they were caught by the US-backed Syrian Democratic Forces during the battle to destroy the IS "caliphate".
Iraqi courts have placed on trial hundreds of foreigners, condemning many to life in prison and others to death, although no foreign IS members have yet been executed.
Those sentenced on Sunday were among 12 French citizens who were caught in Syria and transferred to Iraqi custody in February.
Rights groups including Human Rights Watch have criticised Iraq's anti-terror trials, which they say often rely on circumstantial evidence or confessions obtained under torture.
The country remains in the top five "executioner" nations in the world, according to an Amnesty International report in April.
Analysts have also warned that prisons in Iraq have in the past acted as "academies" for future jihadists, including IS supremo Abu Bakr al-Baghdadi.For all the latest business news from the UAE and Gulf countries, follow us on Twitter and Linkedin, like us on Facebook and subscribe to our YouTube page, which is updated daily.
Subscribe to Arabian Business' newsletter to receive the latest breaking news and business stories in Dubai,the UAE and the GCC straight to your inbox.