Elon Musk tweeted some warnings about artificial intelligence on Friday night.

"If you're not concerned about AI safety, you should be.

Vastly more risk than North Korea," Musk tweeted after his $1 billion startup, OpenAI, made a surprise appearance at a $24 million video game tournament Friday night, beating the world's best players in the video game, "Dota 2."

Musk claimed OpenAI's bot was the first to beat the world's best players in competitive eSports, but quickly warned that increasingly powerful artificial intelligence like OpenAI's bot — which learned by playing a "thousand lifetimes" of matches against itself — would eventually need to be reined in for our own safety.

"Nobody likes being regulated, but everything (cars, planes, food, drugs, etc) that's a danger to the public is regulated.

AI should be too," Musk said in another tweet on Friday night.

The text above is a summary, you can read full article here.