Malaysian media is trickling out details of Kim Jong Nam's autopsy report.
The half brother of Kim Jong Il was murdered in Kuala Lumpur airport Monday.
Malaysia's Star Online cited an unidentified source saying Kim's body shows no visible external injury, and there are also no apparent injection marks or acid burns.
Either of those might be expected to be present if the attackers used hydrochloric or sulfuric acid, as some have speculated.
The report says investigators are still waiting for laboratory results in order to draw clearer conclusions.