Paladin Lore: Uther?

Greetings, all! As the subject suggests, I have a lore question regarding Uther Lightbringer. I've gone throught the WoW history section and found some mention of Uther but nothing of his death (...hope I didn't miss it!). I'm assuming he died within recent memory but when exactly and how? Was he killed by Arthas? A demon? Perished in Outland? And is there a good source of info on him or is this something that reveals itself throughout the paladin gameplay? I'm working on a rp backstory for a new character so any answers you may be able to render would be greatly appreciated. Thanks!