A troubling trend at Churchill Downs continued on Sunday, as another horse died to make it eight since April 29.

The first seven died leading up to the Kentucky Derby’s race on May 6, and according to multiple reports, 3-year-old Rio Moon “suffered a catastrophic injury to his left foreleg a few strides after the wire” and was euthanized on Sunday.

The sixth and seventh horses — 3-year-old Chloe’s Dream and 3-year-old Freezing Point — died after sustaining injuries on May 6 during the races ahead of the main run, with the trainer for Chloe’s Dream telling the Associated Press that “he just took a bad step out there” and the trainer for Freezing Point saying that “he just got bumped in the backstretch.”

Those deaths prompted Churchill Downs to release a statement, where it said that the incidents are believed to be “anomalies” but added that they’re “unacceptable.”

“The equine fatalities leading to this year’s Kentucky Derby are a sobering reminder of the urgent need to mobilize our industry in order to explore every avenue possible and effectively minimize any avoidable risk in the sport,” Churchill Downs said in the statement following the Kentucky Derby. 

“Despite our determination to continually improve upon the highest industry standards, there is more to be done and we will rigorously work to understand what caused these incidents and build upon our existing data, programs and practices to better understand what has been incredibly difficult for us to witness and accept this week.” 

Take Charge Briana, Wild on Ice, Code of Kings, Chasing Artie and Parents Pride were the other five horses who died.

Code of Kings was the first death, which occurred on April 29.

The deaths of Chasing Artie and Parents Pride — which Churchill Downs said in a statement were “highly unusual,” along with the other deaths so close together — resulted in trainer Saffie Joseph getting suspended by the racetrack.

“Given the unexplained sudden deaths, we have reasonable concerns about the condition of his horses, and decided to suspend him indefinitely until details are analyzed and understood,” Bill Mudd, the president and COO of Churchill Downs Incorporated, said in a May 4 statement.

The string of deaths ahead of the 149th Kentucky Derby — which Mage won to cap a stretch defined by the horse deaths and not the race itself — prompted People for the Ethical Treatment of Animals (PETA) to blast Churchill Downs for being a “killing field,” demanding the closure of the track to implement stronger protocols.

The next leg of the Triple Crown comes on Saturday with the Preakness Stakes.