Islamic State militants have threatened to kill another American in a video released on Friday that shows the murder of the British aid worker Alan Henning.

Isis identified the man as Peter Edward Kassig, and said he would be the next western hostage to die unless the US-led coalition stopped its bombing campaign against the militant group in Iraq and Syria.

A statement by Kassig’s parents, Ed and Paula Kassig of Indianapolis, confirmed that he was a hostage. They said he was captured in October last year, while undertaking humanitarian work in Syria.

Kassig appears at the end of the Henning video, as his captor threatens he will be killed in retribution for US-led air strikes. “Obama, you have started your aerial bombardment of Sham, which keeps on striking our people, so it is only right that we continue to strike the neck of your people,” a masked militant in the video said, referring to the area of Iraq and Syria overrun by Isis.

Kassig’s parents appealed for support and expressed sympathy for Henning’s family. “The Kassig family extends our concern for the family of Alan Henning. We have read about his work and his generous character with great respect and admiration.”

Henning is the fourth western hostage to have been killed by the group, following the filmed beheadings of US journalists James Foley and Steven Sotloff, and Scottish aid worker David Haines.

“We ask everyone around the world to pray for the Henning family, for our son, and for the release of all innocent people being held hostage in the Middle East and around the globe,” the Kassig family said. The statement referred to him by the name of Abdul-Rahman Kassig, saying he had converted to Islam in captivity.

Kassig enlisted in the US army in 2004, according to his army records obtained by the Associated Press, and became a ranger, ultimately serving in the 75th Ranger Regiment, an army special operations unit.



An Indianapolis native, Kassig was deployed to Iraq in 2007, according to an interview he gave to Time magazine. He was honourably discharged from the army for medical reasons, his family said. He attended Butler University in Indianapolis between 2011 and 2013 to study political science and government, according to his LinkedIn profile.

Kassig went to Beirut, the capital of Lebanon, during spring break 2012. “I was interested in what I could learn about the Syrian crisis first-hand and what I could do to help and raise awareness about the crisis amongst my peers back at home in the United States,” he told Time. He had been taking an entry-level Arabic course there.



He described his travels throughout Lebanon, particularly his experiences volunteering “on a small scale” in a Palestinian refugee camp in southern Beirut, as well as in a hospital in Tripoli, Lebanon, “offering my services as a trauma medic to Syrian refugees who have been wounded in the fighting in Syria”.

In 2012 he founded Special Emergency and Response and Assistance (Sera), a “medically-oriented emergency relief organization” serving the internally displaced and refugees. The organization was focused on the civil war in Syria.

Sera, a small operation, specialized in “non-material aid and assistance”, which largely means providing medical training, coordinating relief for “high-risk” medical cases and coordinating the delivery of medical supplies to children and civilians to “field camps, refugee camps and hospitals located in Lebanon and Syria.

Photographs on the organization’s website shows Kassig providing training and medical treatment.

Kassig’s family said he was undertaking a project for Sera when he was captured on 1 October last year, on his way to Deir Ezzour in eastern Syria.

Lisa Monaco, President Obama’s top counter-terrorism adviser, said the administration had seen the latest video and was assessing it.

“This is again yet another just very clear example of the brutality of this group, and why the president has articulated and is moving out in a comprehensive way to degrade and destroy Isil,” Monaco said, using the administration’s preferred acronym for the group.

“Our hearts go out to the British aid worker who we believe is in that video, and to the remaining hostages and to their families.”

In a statement, British prime minister David Cameron said: “The brutal murder of Alan Henning by Isil shows just how barbaric and repulsive these terrorists are. My thoughts and prayers tonight are with Alan’s wife Barbara, their children and all those who loved him.

“Alan had gone to Syria to help get aid to people of all faiths in their hour of need. The fact that he was taken hostage when trying to help others and [has] now [been] murdered demonstrates that there are no limits to the depravity of these Isil terrorists. We will do all we can to hunt down these murderers and bring them to justice.”

Barack Obama said that the US, along with its allies, would continue to take action to destroy Isis. He said: “The United States strongly condemns the brutal murder of United Kingdom citizen Alan Henning by the terrorist group Isil.

“Mr Henning worked to help improve the lives of the Syrian people and his death is a great loss for them, for his family and the people of the United Kingdom.”

Henning, 47, a taxi driver from Eccles, Greater Manchester, had been held captive in Syria for nine months, and is thought to have been held by Isis with up to 20 other western hostages for much of that time. Described by friends as “a big man with a big heart”, Henning fell into the group’s hands after joining a group of Muslim friends on an aid convoy to Syria last Christmas.



It was the second time in nine months that Henning had joined an aid convoy to Syria, after helping to raise funds to purchase the ambulances and medical equipment being taken into the country. Other volunteers on the convoy have since described how he was separated from them after armed men surrounded a warehouse a short drive from the Turkish border, where they were delivering ambulances and medical equipment.

The gunmen claimed that they were suspicious about Henning because he was not a Muslim, and because he had a chip in his UK passport. He was taken away despite the other volunteers demonstrating that all UK passports carried such a chip.

Henning was shown and named in a previous video by Isis, which depicted the murder of Haines, 44, a father of two from Perth in central Scotland.