Since those (now removed) nude photos of Scarlett Johansson were leaked Wednesday, her camp has been on the war-path to have the culprit tracked down and prosecuted, and have called the FBI in on the hunt. Says TMZ,

The scofflaws who hacked Scarlett Johansson’s cell phone … and then leaked several nude pics — are in the crosshairs of the FBI, and we’re told the Feds already know the identity of the main culprit.

TMZ broke the story … Scarlett contacted the FBI yesterday after the pics — one which features her bare breasts and another showcasing her behind — were leaked to several websites.

Law enforcement sources tell TMZ … the FBI is “honing in” on the group of hackers and know the identity of at least one of them — and we’re told it’s the ringleader.

Our sources say the hackers have done their dirty work on the cell phones of other celebs, including Vanessa Hudgens, Jessica Alba, Lindsey Vonn, Ali Larter and Emma Caulfield.

It’s nice to know that the FBI is there to protect us from the terrifying threat of boobies. Now I can sleep peacefully at night knowing I’m not going to be pummeled in my sleep by a devious set of breasts. Actually, I’m not worried about that happening, it’s more like hoping.

With Taiwanese actress Shu Qi at a Moët & Chandon event in Shanghai: