IS says future attacks better executed

The latest issue of Islamic State's magazine includes an article purported to be by kidnapped British journalist John Cantlie, warning attacks like those in Australia and other Western countries will become more frequent and better-executed.

The eighth issue of Dabiq magazine also boasts about attacks in Yemen as well as one on a museum in Tunisia earlier this month in which 22 people were killed including one Australian.

The English-language magazine has published an article under Cantlie's byline claiming there will be many more attacks on Western soil like those carried out in France, Australia and other countries.

"France, Belgium, Denmark, Australia, and Canada have all been the targets of mujahidin attacks over the last three months alone, and as more Islamic fighters from different groups in different countries pledge allegiance to the Islamic State, such attacks will surely only become more numerous and better-executed," the article says.

Cantlie, a British war photographer and correspondent, was kidnapped in Syria with American James Foley in November 2012 and remains a hostage. He has featured in a number of Islamic State propaganda videos.

Foley was beheaded by Islamic State in August 2014.

In an article titled Soldier of Terror, the magazine praises attacks in Yemen, and in Tunisia on March 18 when 22 people were killed at the Bardo National Museum, including dual Australian-Colombian national Javier Camelo.

The two gunmen "entered the museum located across from the Tunisian parliament and poured terror on the kuffar inside, killing more than 20 of them and injuring a dozen others," the article says.

"The operation succeeded in bringing anguish to a number of the nations involved in the crusader coalition (Italy, France, Britain, Japan, Poland, Australia, Spain, and Belgium), after some of their own citizens became prey for the soldiers of the Islamic State."