Khloe and Lamar Together Again ... As Crime Victims

3/4/2014 3:55 AM PST

Khloe Kardashian Lamar Odom -- Together Again ... As Crime Victims

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Khloe Kardashian
and Lamar Odom are united again ... as victims of a quarter-of-a-million dollar jewelry heist.

Law enforcement sources tell TMZ ... someone pilfered watches and gold chains inside the former couple's Tarzana home ... which has sat empty for more than a month.

Cops tell us they think it's an inside job because there are no signs of forced entry.

As you know ... Khloe filed for divorce and has moved on.  The house was sold to "Big Bang Theory" star Kaley Cuoco.

The jewelry theft was discovered Monday night ... when Khloe and Kris were there cleaning out the house for the new owner.

As for who did it ... cops are investigating.  The house has undergone work over the last month so detectives are focusing on some of the tradesmen.