Islamic State (ISIS)’s second-in-command has been killed in a US-led airstrike in the Iraqi city of Tal Afar, the Iraqi Defense Ministry stated Wednesday. 

Abdul Rahman Mustafa Mohammed, also known as Abu Alaa al-Afri, was in a mosque struck by US and coalition forces, they said. According to Iraqi government spokesman Tahsin Ibrahim, he was meeting dozens of terrorists in the area, the BBC reported. 

Neither the US military or ISIS itself has confirmed the report. 

Mohammed has been named as ISIS’s “acting leader” after its official chief, Abu Bakr al-Baghdadi, was injured in an airstrike in March. Recent reports indicate that Baghdadi’s spinal injures may have permanently incapacitated him, according to the Telegraph. 

Last week, Washington offered a $20 million reward for information on Mohammed and three other ISIS leaders, Abu Mohammed al-Adnani, Tarkhan Tayumurazovich Batirashvili, and Tariq Bin-al-Tahar Bin al Falih al-‘Awni al-Harzi.