Police said they are investigating Anne Heche for a felony DUI traffic collision.
According to multiple reports, Heche was under the influence when she crashed her car into a home in Los Angeles last Friday.
Yahoo Entertainment reported that blood draw results showed the presence of narcotics; however additional testing is required to rule out what was given to her medically.
Celebrity website TMZ cited sources as saying cocaine was one of the substances found, as well as fentanyl. The Los Angeles Times reports Heche was under the influence of cocaine during the crash. A police spokesperson said it's "unknown at this time" and more testing will be performed.