Jihadists are claimed to have taken over land in a secluded village in Bosnia to establish training camps.
It is feared the hillside location, which is not mapped by GPS satellites, is now a “major threat.”
And the area could be used to plot devastating terror attacks on Western targets.
At least 12 ISIS fighters are believed to have trained in the Bosnian village of Osve before travelling to Syria recently.
Terror expert Dzevad Galijasevic told the Sunday Mirror: “From this village a large number of people went to Syria and are going constantly.
“The chosen location of some of the properties is on a hill, where there is no possibility to approach without being seen.
“It is clear that the source of the terrorist threat is right there.
“It is a major threat.
“There is no one there who isn’t ready to respond to the summons to jihad.”
At least 12 ISIS fighters are believed to have trained in the Bosnian village of Osve before travelling to Syria recently.
Terror expert Dzevad Galijasevic told the Sunday Mirror: “From this village a large number of people went to Syria and are going constantly.
“The chosen location of some of the properties is on a hill, where there is no possibility to approach without being seen.
“It is clear that the source of the terrorist threat is right there.
“It is a major threat.
“There is no one there who isn’t ready to respond to the summons to jihad.”
Mr Cameron told how he wanted Britain to “step up and do more” as he hinted at launching missile strikes against the terror group in Syria as well as iraq.
And the Tory leader warned that jihadists will use British teenage recruits as “cannon fodder”.
