Authorities say six males were found dead late Wednesday at Prospect Valley Dairy, a large operation located about 35 miles northeast of Denver in rural Weld County. Fire-rescue crews were dispatched around 6 p.m. for what was reported as a confined-space rescue and discovered all six victims inside the area. Chief Deputy Coroner Jolene Weiner said preliminary observations point to a possible gas exposure, though the exact cause of death will not be confirmed until autopsies are completed in the coming days. The victims were described as Hispanic and mostly adults; one may have been 17 years old. Their identities and employment status at the dairy have not been released. The Weld County Sheriff’s Office said no evidence of foul play has emerged. The Occupational Safety and Health Administration has opened an investigation, and the Southeast Weld Fire Protection District has withheld further details pending those inquiries.