Kat Von D has been threatened by an online stalker who says he will “go Columbine in Los Angeles”.

The TV personality is said to fear for her life after Michael Nunn from Iowa tweeted that he wants to kill her. Michael claims that Kat ruined his life and has stated that he wants “revenge”, according to TMZ. Last week he took to Twitter to vent about the famed tattoo artist.

"You have to understand, Kat, my life is over because of you. Therefore, what would my only reason for living be' Revenge," Michael wrote on June 4.

The website claims Michael speaks of feeling guilty about what he is “about to initiate”, with threats he will “go Columbine in Los Angeles”. This is a reference to the 1999 high school massacre which took place in Columbine and saw 12 students and one teacher murdered.

"Get it through your f**king head!! Lose the game or watch people die! Your running out of time and I'm not running out of anger and determination (sic)," he also told the star, according to an LAPD search warrant TMZ has seen.

The 32-year-old tattoo artist has allegedly been stalked by Michael since 2012, ending in her getting a restraining order against him which is to last until 2015.

Prior to that Michael had reportedly harassed Kat with phone calls, shown up at her home and whilst at her work place.
The stipulations of the restraining order mean that Michael has to stay at least 300 yards away from Kat at all times.

According to the Mexican-born star, Michael has "delusional and paranoid tendencies, including the belief that the FBI is watching him."

In a video posted ten months ago Michael talks directly into his camera about Kat. He seems confused throughout and flips from one subject to another.

“I enjoy Kathy’s little makeup videos,” says Michael, smiling directly at screen.

Police are searching for Michael, but have yet to find him.