An online image purports to show a Croatian hostage held by Islamic State's Egyptian affiliate beheaded.

A prosecutor has said a beheading and subsequent attack on a French industrial gas factory bore the trademark of the Islamic State group (IS).

Even as French investigators piece together a clearer picture of events that led on Friday to the beheading of a transport firm manager and attempted destruction of a chemicals plant, the real motivation of the chief suspect remains elusive.

The main suspect in the beheading of a French transportation company manager has admitted to police he carried out the killing that authorities have called a terror attack.

A video from Nigeria’s Boko Haram extremist group has shown the bodies of two beheaded men accused of spying, and copies some of the hallmarks of propaganda from Islamic State.

A man has been arrested after another man in his 60s was beheaded today in an attack on a north London street.

A man was beheaded today during an attack in a north London street, sources said.