Threatening packages sent to troubled pop star Britney Spears by an obsessed fan contain sex toys and pornographic letters and have the names of Brad Pitt and Angelina Jolie scrawled on the outside in ink. In this file photo Britney is out shopping at Intermix clothing store on Robertson in Beverly Hills, Wednesday, March 5. Photo Credit: Splash News

March 9, 2008 (Sawf News) - Threatening packages sent to troubled pop star Britney Spears by an obsessed fan contain sex toys and pornographic letters and have the names of Brad Pitt and Angelina Jolie scrawled on the outside in ink.

"It started about six weeks ago with just letters being sent once a week," a source who has seen the packages revealed to OK!.

"And then it quickly escalated to larger packages that now arrive two to three times a week - always to the same L.A. address, but never to one of Britney's homes."

The packages, which bear a return address in the Minneapolis, Minn., area, have not been shown to Britney since their content is disturbing. They are being handed over to the FBI through Britney's security team.

Typically they contain a battery operated sex toy and two threatening and pornographic letters, one handwritten and the other computer printed.

"The handwritten one is on note paper and it's written in a crazy, all-caps chicken scratch," says the source.

The five page computer printed letter details the writer's fantasy sexual exploits with Britney.

The packages also contain a bizarre photo of the sender - a middle aged Caucasian male with stringy, greasy hair - that shows him squirting a yellowish liquid into his open mouth. Chillingly, the eyes are cutout from the photo.