Updated

A stuntman has died while filming an action scene for "The Expendables 2" movie in Bulgaria, local newspaper The Sofia Echo reported Friday.

The accident happened Thursday when two men were performing a stunt that involved an explosion in a rubber boat. They were on the Ognyanovo reservoir near Elin Pelin, located 15 miles outside the capital, Sofia.

The second stuntman was rushed to the hospital. He is reportedly unconscious but in stable condition after undergoing a five-hour operation.

Both men involved were members of the second unit stunt team, and were filming the scene while the first unit was shooting in the popular mountain resort of Bansko, located two-and-a-half hours away, according to the report.

The production company for the star-studded movie, Nu Image/Millennium Films, released a statement saying, "It is with great regret that we confirm this unfortunate accident."

"Our hearts go out to the families and those on the production affected by this tragedy. The filmmakers are working closely with the authorities in responding to and investigating this accident," a spokesperson added.

"The Expendables 2" boasts a stellar cast of action-film stars, including Sylvester Stallone, Bruce Willis and Arnold Schwarzenegger.