Law enforcement sources tell TMZ, Kendall left her Hollywood Hills home Wednesday around noon and returned around 8 PM. We're told she was hanging around the house for several hours, and noticed nothing amiss ... that is, until she went into her bedroom just after 1 AM and realized some of her jewelry was missing. She called the cops, who responded quickly.
Our sources say there was no sign of forced entry, and so far no suspects.
TMZ broke a story last August ... an alleged stalker followed Kendall up her driveway shortly after she bought the Hollywood Hills home.
Law enforcement sources say, although a number of celebs have been burglary victims this year, it's become a much bigger problem citywide.
As for Kendall, cops are on the hunt.