IDAHO SPRINGS, Colo. (CBS4) – Authorities are investigating after a person was shot to death in Idaho Springs on Sunday.

According to the District Attorney Bruce Brown’s office, Idaho Springs police officers responded to a call for medical assistance at an apartment building located at 345 Idaho Street Sunday evening.

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“The injured party suffered what appears to have been a gunshot wound to the head and died at a hospital on Monday,” the district attorney’s office said in a statement.

Police arrested a person of interest who has since been released without charges.

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The Idaho Springs Police Department, Clear Creek County Sheriff’s office and Colorado Bureau of Investigation are investigating the incident.

An autopsy has been scheduled.

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No names or genders have been released.