Police in Los Angeles have successfully tracked down a Kat Von D fan and questioned him over allegations he was planning a revenge attack on the celebrity tattoo artist after she obtained a restraining order against him.

Michael Nunn was ordered to stay away from the reality Tv star in 2012 and cops launched a hunt for him this week (beg16Jun14) after he sent her a worrying message via Twitter.com which threatened "revenge" and referenced the deadly 1999 Columbine school massacre in Colorado.

Editors of Tmz.com report Los Angeles police officers teamed with cops in Nunn's native Iowa and made contact with him.

He was questioned over the alleged threat, but was not arrested, and officers have reportedly decided no further action will be taken.