Hard Blow: Stallone: Losing Expendables 2 stuntman 'very hard

The death of a stuntman while filming action sequel The Expendables 2 was "very hard" to deal with, its star Sylvester Stallone has said. "The stunt team took it very, very hard and shut down for quite a while," the 66-year-old told reporters while promoting the movie in London. "It's happened twice before on films I've been on and it's never easy." Kun Liu was killed last October while filming in Bulgaria. Another performer, Nuo Sun, was seriously injured. "Our hearts go out to the families and those on the production affected by this tragedy," the producers said in a statement released at the time of the "unfortunate" accident. The accident happened in October during the filming of an explosion on an inflatable boat on Bulgaria's Lake Ognyanova. Kun Liu's parents are seeking unspecified damages from production companies Millennium Films and Nu Image, and the movie's stunt co-ordinator Chad Stahelski. Jason Statham (left) and Dolph Lundgren are also part of the cast Stallone's visit to the capital follows the passing of his own son Sage, who was found dead in Los Angeles last month at the age of 36. The Expendables 2, a sequel to Stallone's 2010 box-office success, is released in the UK on Thursday.