US electric auto maker Tesla said Monday it had launched an investigation after a video circulating in China showed one of its cars suddenly burst into flames in a garage in Shanghai. The security camera footage has become on the hottest topics on China’s Twitter-like Weibo platform since it was posted on Sunday, now viewed 22 million times with the hashtag “Tesla self-ignites”. It is the latest incident to hit Tesla this year, just as it is stepping up its presence in China.