Jennifer Aniston & Cameron Diaz At War Over Paul Sculfor?

Cameron Diaz and Jennifer Aniston are reportedly clashing over model Paul Sculfor.

Tensions apparently arose after Jennifer started dating Cameron's ex John Mayer back in April - and since then things have been getting heated over their mutual love interest.

Jen – who also dated Cameron's current beau Paul last year – is now said to have been opening up the lines of communication with the Essex born model in an attempt to get reacquainted.

A U.S. publication claims that, what started out as the odd, innocent text message asking for tips on places to visit in London, has become far more frequent.

Yet cool Cam is not feeling threatened, according to the report.

"She know that there's no way Paul's interested in Jennifer as anything more than a casual friend," a source In Touch.

"He told Cameron that they weren't really seeing each other very seriously last year."

However the insider adds, "Cameron is telling people that she's annoyed that Jen's still texting Paul. She hopes Jennifer will get the message and back off."

See Jen's dating CV here.