Former WCW wrestler Silver King has died after reportedly suffering a 'medical issue' in the ring during a show in London.
The 51-year-old - real name César Barrón - passed away following an incident at the Roundhouse venue in east London last night in front of a horrified audience.
Barron was performing at the 'Greatest Show of Lucha Libre' with former WWE cruiserweight star Juventud Guerrera when tragedy struck.
Footage of the event shared on social media shows Barron collapsed in the ring, with Guerrera attempting to roll him over to pin him as part of the show, before realising something had gone horribly wrong.
A host of wrestlers have paid tribute to Barron, best known to western audiences as one of the high flying luchadores in WWE's then rival promotion WCW in the late 1990s.
Silver King also starred on the big screen, having appeared alongside Jack Black in the 2006 comedy wrestling film Nacho Libre.
WWE'S Tommy Dreamer wrote on Twitter: "Terrible news of Silver King passing away in the ring tonight. He was a star in Mexico, Japan & WCW. Pray for strength for his family."
NXT star Kassius Ohno also took to Twitter to pay tribute, posting: "Terrible news. Please keep Silver King’s friends & families in your thoughts. RIP."
And fellow wrestler Christopher Daniels added: "The news of Silver King’s passing hits me hard. I was lucky to be able to tour and work New Japan with him. Such a great person. Rest In Peace, good sir."
Barrón performed in WCW (World Championship Wrestling) between 1997 and 2000, when he worked without one of the famous Mexican wrestling masks.