Tesla and SpaceX CEO Elon Musk has shared his concern on the potential of artificial intelligence (AI) to cause World War III.

On Monday, referring to an article published on The Verge titled “Putin says the nation that leads in AI ‘will be the ruler of world,’" Musk tweeted,” China, Russia and soon all countries with strong competition science. Competition for AI superiority at national level most likely cause of World War III, in my opinion.”

China, Russia, soon all countries w strong computer science. Competition for AI superiority at national level most likely cause of WW3 imo.

— Elon Musk (@elonmusk) September 4, 2017

He also said this in reply to one of his followers, ”[World War III] maybe not initiated by the country leaders, but one of the AIs, if it decides that a preemptive strike is the most probable path to victory.”

Read also: Tech leaders warn against 'Pandora's box' of robotic weapons

Prior to the tweet, Musk had expressed his concern regarding the potential of wars caused by AI. On Aug. 14, he tweeted, “If you’re not concerned about AI safety, you should be. Vastly more risk than North Korea.”

If you're not concerned about AI safety, you should be. Vastly more risk than North Korea. pic.twitter.com/2z0tiid0lc

— Elon Musk (@elonmusk) August 12, 2017

He had previously suggested that governments should regulate AI to avoid public danger.

Musk reportedly was among the 100 robotics and artificial intelligence entrepreneurs that signed a letter to the United Nations, asking the organization to prevent the development of autonomous weapons.

Musk and British astrophysicist Stephen Hawking have repeatedly expressed their opinions about the dangers of AI. (kes)