A child exploitation investigation that began overseas led federal, state, and local authorities to serve a search warrant at a Medford residence Wednesday. Investigators seized digital devices and are working to identify a suspect.

Investigators served a search warrant at an Ashland apartment Wednesday after authorities say an unidentified suspect sent more than 2,000 child sexual abuse material images to an undercover investigator. Digital devices were seized as investigators work to identify the suspect.

A Roseburg man has been sentenced to 14 years and eight months in prison after investigators uncovered more than 740,000 child sexual abuse files in what Oregon officials described as one of the largest such cases in recent state history.