isil said Wednesday it had killed two hostages, one Chinese and a Norwegian.

The Takfiri group, ISIL (so-called Islamic State in Iraq and Levant) said Wednesday it had killed two hostages, one Chinese and a Norwegian, as French and Russian air strikes on its Syrian stronghold reportedly left 33 insurgents dead.

Takfiris’ English-language Dabiq magazine featured graphic photos of two bodies that appeared to be Chinese hostage Fan Jinghui and Norwegian Ole-Johan Grimsgaard-Ofstad.

A stamp-like caption overlaid on the full-page photo read: "Executed after being abandoned by the kafir (disbeliever) nations and organizations."

It was unclear when, where, or how they were killed, but their heads were bloodied by apparent gunshot wounds.

Their deaths come days after 129 people were killed in Paris in the worst ever militant attacks on French soil, and as Moscow launched fresh air raids against ISIL in Syria after confirming a "terrorist attack" brought down a Russian passenger jet in Egypt last month.

The Norwegian prime minister's office said the ISIL photos "seem to show that the hostage Ole-Johan Grimsgaard-Ofstad was executed. We are still verifying it."

China confirmed Fan's "inhuman" death in a statement posted on the foreign ministry website Thursday, vowing to bring his killers to justice.

"The terrorist organization has no regard for human decency and the bottom line of morality," ministry spokesman Hong Lei said.

"The Chinese government strongly condemns this inhuman atrocity; we must bring these criminals to justice."

President Xi Jinping was quoted by state media as saying: "Terrorism is the public enemy of human beings."

The two men were last featured in Dabiq's September edition, in which ISIL published an "advertisement" that they were "for sale".