The SpaceX Starship SN4 Raptor Engine exploded on the test stand after an engine static fire test run (29/05/2020) at the facility in Boca Chica, Texas. Below is a link to the story. If the link is not active, just copy and paste it in your browser.
https://techcrunch.com/2020/05/29/sp...ine-fire-test/
If you look at approximately the 1:22:32 point on the 2 hour NASA video, you'll see the Raptor engine fire for just a second or two, then shut down. At approximately 1:24:48 of the video, the explosion occurs. It looks like the Starship SN4 Raptor Engine is no more. Apparently, nobody was injured in this incident.
Cheers,
Grog