Los Angeles County Sheriff's Department Sgt. Kristy Criner said approximately $108,000 in jewelry was taken from the "Kourtney and Khloe Take Miami" star's home during Saturday night's robbery, People.com reported Sunday.
"That's what was discovered missing in the initial investigation," Criner told People. "Sheriff's investigators and our crime lab are responding on the scene."
The robbery comes as Kardashian, 30, is pregnant with her first child with boyfriend Scott Disick.
TMZ.com said Kardashian discovered the break-in after returning from dinner with Disick.
TMZ.com said among the items missing from the home is vintage jewelry Kardashian was given by her late father, Robert, and a Cartier watch worth an almost $30,000.