7:00 PM PT — Law enforcement sources tell TMZ, Kim went to bed early last night, because she wasn’t feeling well and when family members went to wake her Thursday she was non-responsive.  Paramedics pronounced Kim dead at her home.

As for the cause … we’re told she was battling an illness — either the flu or pneumonia — over the last few days and was being treated with Saline and vitamins. Authorities are also looking at a recent trip Kim took to Africa, to determine if she contracted a disease.

No illegal drugs were found.

The coroner will perform an autopsy and perform toxicology tests.

Source: www.tmz.com