The family of Kun Liu, an “Expendables 2” stuntman who was accidentally killed during an explosion on the set of the movie, are suing the producers, claiming they have failed to take the proper safety precautions.

According to reports, the lawsuit was filed on Thursday by Zong Yu Liu and Yan Mei Bai — the parents of Kun Liu — stating that their 26-year-old son was killed during a stunt in Bulgaria back in October 2011. They were performing a stunt in a rubber boat on Ognyanovo dam, just outside the Bulgaria capital, Sofia. The “Expendables 2” scene involved the use of high powered explosives and other “ultra-hazardous activities.” Kun Liu, a native of Beijing, China, died after suffering wounds from a nearby explosion.

The parents of the “Expendables 2” stunt man blame the production company, Millenium Films, and the stunt coordinator, Chad Stahelski for the death of their son, hence the filing of the lawsuit against both parties.  Zong Yu Liu and Yan Mei Bai are seeking unspecified damages of more than $25,000.

Kun Liu’s parents also believe that they should be compensated for the funeral and burial expenses, as well as “the loss of society, love, comfort, attention, services and support” of their son. They claim that the filmmakers of “Expendables 2″ and Chad Stahelski “negligently and carelessly failed to provide adequate protection from hard to the participants of the stunts.”

Bulgarian authorities at the time reported another movie stunt man was seriously injured during the explosion that killed Kun Liu.

Stahelski and Elizabeth Wolfe, a spokeswoman for Millennium Films, declined to give any comment on the case.

“The Expendables 2” starring actors such as Arnold Schwarzenegger, Bruce Willis and Sylvester Stallone is due to be released in the United States on August 3.