Western journalist says IS jihadist group "more dangerous" than any other in world

The first Western journalist who was allowed extensive access to the Islamic State territories in Iraq and Syria has revealed that the jihadist group is "much stronger and much more dangerous" than any other in the world.

German journalist Jurgen Todenhofer travelled from Turkey to Mosul, the biggest city occupied by the IS after months of negotiations with IS militants, reported the Independent.

He plans to publish a summary of his 10 days under the Islamic State rule on Monday but discussed how it was to live in IS territories.

He said that he lived in the same hotel as U.S. journalist James Foley and claimed that he had seen the brutal video.

Todenhofer was constantly concerned as to how he could avoid the same fate as Foley during his stay at the hotel.

He said that hundreds of fighters arrive in the city from all around the world everyday and that the IS has grown bigger than the United Kingdom.

IS' activities constitute the "largest religious cleansing strategy" that has ever been planned in the entire human history, claimed the German journalist.