AceShowbiz -

Melissa Rivers took to Twitter on Thursday, October 16 to comment on her mother Joan Rivers' autopsy results. She tweeted, "In response to NYC's Medical examiner's report, we continue to be saddened by our tragic loss. No further comment at this time."

New York State Department of Health has released a statement regarding Joan's death investigation. A spokesperson of DOH tells The Hollywood Reporter, "The State Department of Health (DOH) has completed its investigation of Yorkville Endoscopy and has forwarded its findings to the Federal Centers for Medicare and Medicaid Services (CMS). Any questions regarding the status of the final determination should be directed to CMS."

Meanwhile, a representative for Yorkville Endoscopy says in a statement, "HIPAA [privacy] laws prevent us from disclosing any information regarding patients."

Earlier in the day, Joan's cause of death was revealed by New York City Medical Examiner's Office. Spokeswoman Julie Bolcer said in a statement obtained by the site, "The cause of Ms. Rivers' death is anoxic encephalopathy due to hypoxic arrest during laryngoscopy and upper gastrointestinal endoscopy with propofol sedation for evaluation of voice changes and gastroesophageal reflux disease."

Julie continued, "The manner of death is therapeutic complication. The classification of a death as a therapeutic complication means that the death resulted from a predictable complication of medical therapy."