London, Apr 16 : Hollywood heartthrob Robert Pattinson's security has been trebled to protect him from besotted fans.

The 22-year-old actor had to call on extra security while filming Twilight sequel New Moon - as crowds inundated the set in Canada.

Pattinson is apparently deeply embarrassed and more than a little scared by the whole thing.

"It''s got to the point where security measures have had to be trebled to keep these people off the set," the Sun quoted a source as saying.

"At one point a fake shoot was set up to throw these kids off the scent but they are surprisingly resourceful.

"Robert is having to come to terms with having his own personal fan club wherever he goes," the source added. (ANI)