Joseph Gordon Levitt's brother Dan Death?

Dan Gordon Levitt, also known as Burning Dan, was the brother of Inception star Joseph Gordon-Levitt. He died, what a tragedy.
Dan Gordon Levitt's death took place yesterday at the age of 36. The cause of death is not known at this time, he was such a young man, his death was definitely unexpected. The two brothers were very close to each other.

I found out reading Joseph Gordon-Levitt's twitter, he posted a message announcing his brother's death. What happened to Dan Gordon Levitt?

Dan Gordon Levitt passed away over the weekend, of causes unknown. It’s still not clear what the circumstances were.
He was the older brother of Joseph Gordon Levitt, co-star of this summer’s smash “Inception” and the boyfriend in “500 Days of Summer.”

A picture of Dan Gordon Levitt:

Dan was known for being a fire-spinning flow artist and he taught people the art of dancing with fire and flow arts at a school he established. His Facebook page is getting filled with tributes to him.
According to his Tumblr bio, Dan Gordon Levitt traveled "the world teaching people to spin fire and be who they want to be."