A video was released Monday by supporters of the Islamic State group in Saudi Arabia showing the shooting of a Danish national in the capital city of Riyadh last month, according to the SITE Intelligence Group. The ISIS supporters reportedly identified the target as Thomas Hoepner without giving further details about the man's background.

The video was released by a pro-ISIS media group, Al-Battar Media Foundation, but its authenticity could not be immediately confirmed, according to media reports. The video reportedly shows a gunman firing five shots at the driver of a vehicle, and also claims that the shooting was carried out by “Supporters of the Islamic State in the Land of the Two Holy Mosques,” a term used to refer to jihadists residing in Saudi Arabia, according to SITE.

The leaders of the Islamic State group -- Abu Bakr al-Baghdadi and the group's spokesman, Abu Mohammed al-Adnani -- are reportedly heard in the video calling on the group's supporters in Saudi Arabia "to kill and spit upon" people of Western countries involved in fighting the Sunni militant group.

Last month, security officials had reportedly confirmed that a Danish man had been shot and was treated for shoulder injuries, but other details about the incident, which was being investigated, were not revealed. Thies Broegger, a spokesman for the Denmark-based dairy group Arla Foods, told The Associated Press that one of its employees had been shot in Saudi Arabia, but refused to reveal the name of the person or comment on the video.

Denmark, Saudi Arabia and Canada are among some of the nations that have joined the U.S.-led coalition conducting airstrikes against ISIS militants in Iraq and Syria.