(NEWSER) – A Syrian rebel has been caught on video apparently cutting a dead soldier's heart from his body then taking a bite from it. "I swear to God we will eat your hearts and your livers, you soldiers of Bashar the dog," says the rebel, identified by Human Rights Watch as noted rebel figure Abu Sakkar of Homs. HRW calls the act a war crime, and Syria's leading opposition coalition has promised a trial, the BBC reports. "The mutilation of the bodies of enemies is a war crime. But the even more serious issue is the very rapid descent into sectarian rhetoric and violence," an HRW rep tells Reuters.