Another propaganda video of captured British journalist John Cantlie has been released by the Islamic State.

The photojournalist has featured in a series of propaganda videos released by IS extremists in recent weeks and apparently had an article published in the group’s Dabiq magazine.

· ‘John was only there helping the Syrian people’
· Islamic State releases video of detained journalist

Cantlie appeared in the fourth film wearing the same Guantanamo Bay-style orange jumpsuit as in the previous footage.

In the latest video, which appeared on YouTube but was later deleted, he warns of a “third Gulf war” and said the media had learnt nothing from previous wars in Iraq and Afghanistan.

Cantlie is apparently reading from a script and speaking under duress as he talks about the press fuelling support for a “full-blown war” for which IS is prepared.

This week his sister, Jessica Cantlie, spoke out for the first time and urged the terror group to “restart dialogue” with his family.

The freelance journalist from has worked for news organisations including the Sunday Telegraph and Sunday Times in Syria.

He has been held by jihadists since his kidnap in November 2012.