A television actor known for her roles in "Heroes" and "Nashville" has passed away. Hayden Panettiere was 36 years old at the time of her death. Her father announced the news in a statement on Sunday night, expressing profound sadness.

The cause and manner of Panettiere's death have not been disclosed. An investigation is currently underway, according to her publicist. Further details about the investigation and Panettiere's death can be found through her representative or local authorities in Greenville, South Carolina, where the incident occurred.