Fox News senior national correspondent William La Jeunesse reports on the preliminary autopsy of actress Hayden Panettiere revealing no signs of trauma after she was found dead at age 36 in South Carolina on 'America Reports.'

The Drug Enforcement Administration (DEA) has reportedly joined the investigation into actress Hayden Panettiere's death.

TMZ is reporting that the DEA has agents assisting parallel death investigations that are already underway.

Panettiere died Sunday at the age of 36. She was found unresponsive and in cardiac arrest at an apartment in Greenville, South Carolina. Resuscitation efforts were unsuccessful and the "Nashville" and "Remember the Titans" actress was pronounced dead.

The DEA is reportedly joining the investigation into the death of actress Hayden Panettiere. She died Sunday at the age of 36. (Emma McIntyre/Getty Images for amfAR)

Preliminary autopsy results found no signs of trauma that contributed to her death, Fox News Digital confirmed.

This is a developing story. Check back for details.

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