As we reported this week, Xtra Factor host Caroline Flack called in police after a stalker bombarded her with messages, texts and even turned up at the show’s auditions’ venues in order to try to get close to her.

The 39 year old man was arrested and later bailed, pending further inquiries, but today, the Sun reveals that a worried Caroline has had to call in police again after yet another unnamed stalker sent her a picture of “a wild-eyed teenage girl menacingly holding a six-inch kitchen knife.”

Caroline tweeted the photo to The Met Police asking “Acceptable tweet?”

A source close to Caroline said, “Caroline has been very worried…”

And of the arrest last week, the source added, “The man didn’t seem like a normal fan and her people took it very seriously.”

Last November, Caroline received vile death threats over her relationship with One Direction singer Harry Styles. They reportedly left her “distraught” and she took to her own Twitter page, calling for an end to the messages.

She tweeted, “I’m close friends with Harry. He’s one of the nicest people I know. I don’t deserve death threats.”

One troll wrote, “If caroline flack flirts with my boyfriend (Harry) I will personally hunt her down and shoot her.”

Another said, “I want to kill you CarolineFlack, Harry is mine B****”

And yet another remarked, “Stay the **** away from Harry you saggy old woman.”

Awful.