PARIS, Feb. 21 (Xinhua) -- French jihadist Fabien Clain has been killed during an air strike by the international coalition on a holdout of Islamic State (IS) group in Syria, state-run radio France Info reported on Thursday.

Known as the "official voice" of the French IS group, Clain was killed on Wednesday following an air strike which targeted the cell's last pocket of resistance in Baghouz near the Iraqi border. His brother, Jean-Michel, was seriously wounded, the report added.

The Clain brothers were identified as the voices that claimed the terrorist group's fatal attacks of Nov. 13, 2015 in Paris, where a series of suicide bombings and shootings, orchestrated from Syria, killed 130 people. It was the country's deadliest terrorist attack.

In 2018, French investigative magistrates issued an arrest warrant against the Clain brothers over their involvement in the attack.

Fabien Clain, who went by the alias "Brother Omar", converted to Islam in the 1990s. He became active in radical Islamist networks with his 38-year-old brother in the 2000s.

He was convicted in 2009 of recruiting jihadists and sentenced to five years in prison, after which he left France for Syria with his family.