The Islamic State of Iraq and Syria (ISIS) group’s spokesman Abu Mohamed al-Adnini confirmed on Tuesday the killing of the militant organization’s second in command in the U.S. air strike earlier this year.

“America is rejoicing over the killing of Abu Mutaz al-Qurashi and considers this a great victory,” Abu Mohamed al-Adnani said in an audio recording posted on militant websites. “I will not mourn him… he whose only wish was to die in the name of Allah… he has raised men and left behind heroes who, God willing, are yet to harm America.”

In the same audio message, al-Adnani called on Muslims to launch a “holy war” against Russians and Americans over what it called their “crusaders’ war” in the Middle East.

“Islamic youth everywhere, ignite jihad against the Russians and the Americans in their crusaders’ war against Muslims,” al-Adnani said.