The speaker in an audio message posted Thursday on an ISIS social media account claims to be leader Abu Bakr al-Baghdadi . He is heard saying the U.S.-led coalition to destroy ISIS is `` terrified , weak and powerless . '' CNN can not confirm the authenticity of the online message or when it was recorded . The 17-minute audio says the coalition 's effort has been a `` failure '' and the coalition will be `` forced '' to `` send ground forces to their deaths and destruction . '' The speaker also urges Islamic State fighters to take their battle everywhere and `` light the Earth with fire upon all tyrants , '' and mentions U.S. President Barack Obama 's plan to deploy 1,500 additional U.S. troops to Iraq `` under the claim they are advisers . '' Laith Alkhouri , a senior analyst at Flashpoint Partners , a U.S. outfit that tracks jihadist websites , said analysts believe the audio is authentic . It was `` issued on the top-tier Islamic State web forum and other top jihadi web forums , '' Alkhouri said . `` It was posted by the handle of the Islamic State 's official media correspondent . Al-Baghdadi 's voice is clearly heard in the audio . '' There were reports last weekend that al-Baghdadi might have been hit in airstrikes , but it was not clear where he was in Iraq or whether he was wounded . Experts said that ISIS has a clear line of succession and someone would take al-Baghdadi 's place in the radical Sunni group if he was incapacitated or out of the picture entirely . More than 40 nations have joined the global coalition to battle ISIS . The U.S. has conducted an air campaign against the militant group while Kurdish and Iraqi forces have fought on the ground . Obama has asked his national security team to again review the nation 's policy toward Syria . It might not be possible to get rid of ISIS while Syrian President Bashar al-Assad is still in power , senior U.S. officials and diplomats told CNN this week . A pledge to keep fighting . Little is known about al-Baghdadi . He formed his own militant group in the Samarra and Diyala areas of Iraq , where his family is from , and then joined al Qaeda in Iraq . He served four years in a U.S. prison camp for insurgents during the Iraq War . Who is al-Baghdadi ? The voice that 's purportedly al-Baghdadi says that ISIS fighters will wage war for as long as they have to . `` Even if only one soldier of them remained , they will never abandon fighting , because they defy humiliation and injustice , '' the voice says . `` They will never abandon fighting , because they did not taste honor and dignity except by fighting . They will never abandon fighting . Indeed , they are triumphant . They will be triumphant even if only one man of them is left . They are triumphant and upon certainty of Allah 's support for them . '' The voice also says he has good news -- ISIS is expanding into Saudi Arabia , Yemen , Egypt , Libya and Algeria . The posting comes on the same day that ISIS announced on social media that its `` treasury department '' will begin minting its own currency in gold , silver and copper . A statement from the military group said that al-Baghdadi directed the creation of the currently to avoid the `` tyrants ' financial system . '' Sources : Obama seeks new Syria strategy .
Audio message purportedly of Abu Bakr al-Baghdadi calls coalition effort against Islamic State 'useless' The audio message, which was posted on the website of a group that supports ISIS, also called for attacks in Europe and North America. Message appears days after reports that al-Baghdadi was injured in an airstrike . CNN can not confirm those reports , or the audio message allegedly of al-Baghdadi .