French Gendarmes are seen at work next to a black plastic sheet (unseen) outside a gas company site at the industrial area of Saint-Quentin-Fallavier, near Lyon, France, June 26, 2015. A decapitated head covered in Arabic writing was found at a a site belonged to Air Products, a U.S.-based industrial gases technology company, in southeast France on Friday, police sources and French media said, after two assailants rammed a car into the premises, exploding gas containers. REUTERS/Ruben Sprich ATTENTION EDITORS FRENCH LAW REQUIRES THAT CAR REGISTRATION PLATES ARE MASKED IN PUBLICATIONS WITHIN FRANCE

The main suspect in the beheading of a French businessman took a "selfie" photo with the victim and sent the image to at least one recipient, officials said.

Authorities are working to confirm the identity of the recipient, but were not able to immediately confirm media reports that it was sent to an unspecified person in Syria, two French officials said.

Expand Expand Expand Previous Next Close Police officers investigate at a plant where an attack took place, Friday, June 26, 2015 in Saint-Quentin-Fallavier, southeast of Lyon, France. A man with suspected ties to French Islamic radicals rammed a car Friday into an American gas factory in southeastern France, triggering an explosion that injured two people, officials said. The severed head of a local businessman was left hanging at the factory's entrance, along with banners with Arabic inscriptions, they said. (AP Photo/Laurent Cipriani) AP A police officer blocks the road leading to a plant where an attack took place, Friday, June 26, 2015 in Saint-Quentin-Fallavier, southeast of Lyon, France. A man with suspected ties to French Islamic radicals rammed a car Friday into an American gas factory in southeastern France, triggering an explosion that injured two people, officials said. The severed head of a local businessman was left hanging at the factory's entrance, along with banners with Arabic inscriptions, they said. (AP Photo/Laurent Cipriani) AP French Gendarmes remove a black plastic sheet outside the Air Products gas factory site at the industrial area of Saint-Quentin-Fallavier, near Lyon, France, June 26, 2015. A decapitated body daubed with Arabic writing was found at a U.S.-owned factory in southeast France on Friday after an assailant rammed a delivery van into gas containers at the site, triggering an explosion. REUTERS/Ruben Sprich REUTERS / Facebook

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Whatsapp Police officers investigate at a plant where an attack took place, Friday, June 26, 2015 in Saint-Quentin-Fallavier, southeast of Lyon, France. A man with suspected ties to French Islamic radicals rammed a car Friday into an American gas factory in southeastern France, triggering an explosion that injured two people, officials said. The severed head of a local businessman was left hanging at the factory's entrance, along with banners with Arabic inscriptions, they said. (AP Photo/Laurent Cipriani)

On Friday, key suspect Yassine Salhi allegedly crashed a truck into a US-owned chemical warehouse and hung his employer's severed head on a factory gate in Saint-Quentin-Fallavier - in what authorities are calling a terror attack.

He was arrested and remained in police custody on Saturday.

Authorities noted the similarity to tactics used by Islamic State, though no group has claimed responsibility for the attack.

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