Story highlights Ashley Olsen's death is being treated as a homicide, a spokeswoman says

Olsen's boyfriend reportedly was concerned because he had not heard from her

Italian news agency ANSA reports that Olsen, 35, was found strangled

(CNN) An American woman, Ashley Olsen, has been found dead at her apartment in Florence, Italy.

Her death is being treated as a homicide, police spokeswoman Maddalena Carosi said on Italian TV.

Italian news agency ANSA reported that Olsen, 35, was found strangled, but authorities declined to comment on the cause of death until an autopsy is complete.

Olsen's boyfriend, a fellow artist, reportedly found her body on Saturday.

He was concerned because he had not heard from her, so he asked Olsen's landlord to go with him to Olsen's apartment to check on her, ANSA said.

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