Law enforcement sources have revealed to TMZ that someone stole watches and gold chains from the Tarzana home Khloé shared with her estranged husband Lamar Odom.
The mansion has been sat empty for a month now, and police reportedly believe it is an inside job since there were no signs of forced entry.
Khloé filed for divorce from Lamar in December, and the house has since been sold to Big Bang Theory actress Kaley Cuoco and her husband Ryan Sweeting.
The theft was discovered on Monday night, when Khloé and her mother Kris were cleaning out the home for the new owners. It came 24 hours after the 29-year-old's glamorous appearance at Elton John's AIDS Foundation Oscar-viewing party.
Khloé joined her sisters Kim Kardashian, Kourtney Kardashian, Kourtney's partner Scott Disick and Kardashian matriarch Kris Jenner for the bash at West Hollywood Park on Sunday.
The brunette looked striking in a burgundy velvet wrap gown, her hair styled into voluminous curls. She vamped up her look with a gothic lipstick.
Mum-of-one Kim, 33, chose a plunging red ball gown, while Kourtney, 34, looked chic in an on-trend black suit, featuring a sequined jacket and necktie.