Terrorist group ISIS released a video Saturday purportedly showing the execution of British aid worker David Cawthorne Haines.
If confirmed, it is the third time the organization, which has seized large swaths of Iraq and Syria, beheaded a captive and released a video of the execution, intending to send a message to Western nations. Britain recently said it would send machine guns and ammunition to Iraq to help that government battle the militants, and it is weighing whether to participate along with the U.S. in possible airstrikes in Syria against the terror group.
Haines, 44, like others in taped executions by the terror group, is forced in the new video to read a script in which he blamed his death on British Prime Minister David Cameron and the British government's decision to join the U.S. in its battle against ISIS.
A black-clad, masked militant holding a knife then says the execution is in retaliation for Britain's decision to supply arms to Kurdish fighters battling ISIS in Iraq.
After the murder, another captive is shown and the executioner warns Cameron "you ... will have the blood of your people on your hands," if the U.K. continues to ally with the U.S. in its campaign against the group.