Robert Pattinson and Kristen Stewart are being hunted down by “rogue tourists” while shooting Eclipse in Vancouver, according to insiders.

As both Rob and Kristen have suggested in recent interviews, the Twilight cast is having a miserable time of it now that the “whole world” has descended on British Columbia with the aim of tracking down the stars of vampire phenomenon.

"It's not just the media invading [the Twilight cast's] privacy - it's the whole world," a Summit source tells E!'s Awful Truth blog.

"Civilians are flying in all over the world to hunt down whoever they can find. It's bad. Literally [Rob and Kristen] have no choice but to stay inside."

And it's not just individual Twihard trackers that the studio (and the cast) has to worry about – even some tourist companies are cashing in, leading to what the cast and crew are supposedly calling "rogue tourists."

The insider explains: "Everyone calls them the Vultures. The cast hates, hates, hates them.

"The Vultures actually stalk [the cast] - hunt down every set location and hide out in order to record them everywhere they go off set.

“It's become unmanageable."

This follows claims that filming on the remaining Twilight chapters will move back to Portland, Oregon, the location for the first movie.

Rob and Kristen meet the fans in Vancouver