Another horse has been euthanized after a fatal accident on the set of the HBO series ‘Luck,’ according to TMZ.

Apparently, the crew was attempting to get the horse out of a stable when it reared and fell backwards, hitting its head. The horse was then euthanized at the Sanata Anita Race Track in Arcadia, CA. This sort of accident is a common occurrence in stable areas every year, according to a state racing board doctor. Still, a routine necropsy will be conducted and the American Humane Association will investigate the incident.

This is the third time a horse has died while filming “Luck,” a series about horse racing starring Dustin Hoffman. Last month, it was reported that two other horses died during the filming of ‘Luck’ season one in 2010 and 2011.

The AHA has called for production to be halted, and released a statement on the matter – “We are also insisting that this stoppage remain in full effect pending a complete, thorough, and comprehensive investigation.” HBO is set to continue production.