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WELD COUNTY, Colo. — A woman at the Weld County Jail was found dead in her cell just before 6 a.m. Sunday, the Weld County Sheriff’s Office said.

Despite receiving medical attention, the woman died roughly 45 minutes later.

Investigations are being conducted by the sheriff’s office and the Weld County Critical Incident Response Team.

The woman’s family has been notified, but her identity has not been released.

The woman’s name and cause of death will be released by the Weld County Coroner’s Office when the investigation is completed.

The sheriff’s office characterized the death as a “very unfortunate event” but didn’t say whether it was of natural causes.