The Syrian Kurdish YPG said on Sunday that ISIS spokesman Abu al-Hassan al-Muhajir was killed in a joint raid between Kurdish-led and US forces in northern Syria.
The Syrian Democratic Forces (SDF), which the YPG leads, said he was targeted near Syria's border town of Jarablus through efforts between SDF intelligence and the US military.
SDF General Commander Mazloum Abdi said it was "a continuation of the previous operation" in which ISIS leader Abu Bakr al-Baghdadi was killed and described the militant spokesman as Baghdadi's right-hand man.
Baghdadi died "whimpering and crying" in a raid by US special forces in northwest Syria's Idlib province, President Donald Trump announced on Sunday.
The fugitive ISIS leader killed himself during the raid by detonating a suicide vest after fleeing into a dead-end tunnel, Trump said.
On April 30, 2019, Baghdadi appeared in a video for the first time in five years, acknowledging defeat in the group's last stronghold in Syria but vowing a "long battle" ahead.