I can't even begin to explain in words how sad this is. Toriyama-sensei was an absolute legend in the industry and created works and art for works that are loved by millions of people worldwide. Dr Slump, Dragonball, Dragon Quest, Chrono Trigger and even older works like Sand Land which is soon to get a game as well celebrating it. One of the true legends of the manga industry including the Fujio brothers, Tezuka, Miura and many others.
It appears he died after bleeding on the brain from head trauma. RIP.