BEIRUT — In a recording released days after he was reported to be wounded in an airstrike, the leader of the Islamic State group said the U.S.-led coalition’s campaign had failed and it would eventually have to send ground troops into battle.

Abu Bakr al-Baghdadi urged his followers to “explode the volcanoes of jihad everywhere,” according to the 17-minute message posted online Thursday. The recording appeared authentic, matching previous ones from the group.

The statement surfaced four days after Iraqi officials said al-Baghdadi was wounded in an airstrike in Iraq. It was not clear when the recording was made, but there were references to events since the weekend – including pledges of allegiance to the Islamic State group by militants in Libya and Egypt.

It also was unclear why the message was only an audio recording. Al-Baghdadi has made only one public appearance since declaring himself caliph, delivering a sermon at a mosque sermon in June in the Iraqi city of Mosul. An earlier audio recording from him is believed to have inspired militants in Algeria to behead a French national.

U.S. MULLS OTHER OPTIONS

The latest recording was his first since the U.S. and other partners in the alliance began an air campaign against the extremist fighters in both Iraq and Syria. Other messages from the group, including videos of U.S. and British captives being beheaded by the group, have shown other speakers.

In Washington, U.S. Army Gen. Martin Dempsey, chairman of the Joint Chiefs of Staff, told Congress on Thursday that the United States would consider dispatching a modest number of American forces to fight with Iraqi troops as they engage in more complex missions.

“I’m not predicting at this point that I would recommend that those forces in Mosul and along the border would need to be accompanied by U.S. forces, but we’re certainly considering it,” Dempsey told the House Armed Services Committee.

Defense Secretary Chuck Hagel said the coalition had made progress against the militants since beginning its efforts in September.

“ISIL’s advance in parts of Iraq has stalled, and in some cases been reversed, by Iraqi, Kurdish, and tribal forces supported by U.S. and coalition airstrikes,” Hagel told the House Armed Services Committee. “But ISIL continues to represent a serious threat to American interests, our allies, and the Middle East … and wields influence over a broad swath of territory in western and northern Iraq and eastern Syria.”

THREATS INTENSIFY

The mostly Sunni extremists have seized large parts of Syria and Iraq. They later announced their proto-state straddling the two countries, where they have implemented a violent interpretation of Islamic law, including public beheadings, massacring rebellious tribes and selling women and children of religious minorities into slavery.

President Obama had authorized the deployment of advisory teams and trainers to bolster struggling Iraqi forces. Obama’s plan could boost the total number of American troops in Iraq to 3,100. There are about 1,400 U.S. troops there.

Al-Baghdadi said in his statement that the coalition effort had failed to repel his fighters.

“They thought and they estimated, they planned and they conspired, and they prepared to hit the Islamic State, and then they emerged with a failed plan that was to shell the sites of the Islamic State, and its brigades and its vehicles and its soldiers to halt its advance … but quickly the failure of this plan was apparent,” he said. “Soon the Jews and Crusaders will be forced to descend to earth, and to send its ground forces to its end and destruction, by God’s will.”