REUTERS

The audio clip was distributed on Monday on Islamic State's channel on Telegram, an encrypted messaging application. It was attributed to the militant group's official spokesman, Abi al-Hassan al-Muhajer, as reported by Reuters.

The authenticity of the recording could not be independently verified, but the voice was the same as a previous audio message purported to be from the spokesman.

Read alsoU.S.-led coalition strike kills founder of IS media outlet: brother – media"O lions of Mosul, Raqqa, and Tal Afar, God bless those pure arms and bright faces, charge against the rejectionists and the apostates and fight them with the strength of one man," said al-Muhajer. Rejectionist is a derogatory term used to refer to Shi'ite Muslims.

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"To the brethren of faith and belief in Europe, America, Russia, Australia, and others. Your brothers in your land have done well so take them as role models and do as they have done."