It looks like someone linked to the Kardashian clan has sticky fingers.

Days after it was revealed that Khloé Kardahian was reportedly robbed of $250,000 worth of jewelry, TMZ reports that $50,000 was stolen from her older sister Kourtney Kardashian's house around the same time.

According to inside sources, Kourtney received the cash after an appearance gig and she put the money in a safe place in her home for a few days. However, when she finally went to deposit the loot it was missing.

The money was swiped from Kourtney's Calabasas, Calif. home days after news broke that Khloe Kardashian and Lamar Odom's former Tarzana home had been robbed. Because the Kardashian sisters are known to work with the same handlers, investigators believe that the crimes may be linked. Police also believe the two may be inside jobs, since the houses were not broken into.

Police plan to question people who had access to Kourtney's house around the time of the theft.

Last month, the Khloe and her estranged husband put their California mansion up for sale. The couple purchased the home for around $3.95 million when they first got married back in 2009, reports Us Weekly. Now, according to real estate site Trulia, they're hoping to sell it for $5.499 million.

The luxury home, which was built in 2003 within the Mulholland Park Estates gated community, is a sprawling Mediterranean villa that features six bedrooms, nine bathrooms, and a master suite with a mosaic-tiled fireplace and three walk-in closets. The 8,400-square-foot estate also includes formal living and dining rooms, a library and a gourmet kitchen.