Churchill Downs is suspending race operations at the famed racetrack for nearly a month, marking the most dramatic response yet to an ongoing crisis in which 12 horses have died there in the last two months.

Live racing from June 7 until at least July 3 – representing the remainder of the Churchill Downs Spring Meet – will be moved to Ellis Park Racing & Gaming in Henderson, Ky., another Churchill Downs Inc.-owned facility.

Scheduled races on Saturday and Sunday were still held at Churchill Downs. But the four-week suspension arrives as track officials and equine experts continue their search for the cause of the deaths.