Cops Respond To Man Trying To Move In On Kim Kardashian

According to sources close to Kim ... the man showed up late Saturday night. We're told he buzzed the intercom at her security gate and claimed Kim had flown him into town to stay with her -- and that he was supposed to be working on her reality show.

We're told Kim got freaked out when the man refused to leave and a member of her security detail alerted police.