LOS ANGELES — Authorities have arrested at least one person in connection with Matthew Perry's death from an accidental ketamine overdose last year, a law enforcement official tells The Associated Press. The official was not authorized to discuss details of the ongoing investigation and spoke to AP on condition of anonymity. Authorities have scheduled a news conference in Los Angeles to announce details in the case later Thursday morning.

Los Angeles police said in May that they were working with the U.S. Drug Enforcement Administration and the U.

S. Postal Inspection Service with a probe into why the 54-year-old had so much of the surgical anesthetic in his system. Matthew Perry appears at the premiere of "Ride" in Los Angeles on April 28, 2015.

Rich Fury, Associated Press An assistant found Perry face down in his hot tub on Oct. 28, and paramedics who were called immediately declared him dead. His autopsy, released in December, found that the amount of ketamine in his blood was in the range used for general anesthesia during surgery.

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Listen now and subscribe: Apple Podcasts | Google Podcasts | Spotify | RSS Feed | SoundStack The decades-old drug has seen a huge surge in use in recent years as a treatment for depression, anxiety and pain. People close to Perry told coroner’s investigators that he was undergoing ketamine infusion therapy. But the medical examiner said Perry’s last treatment 1 1/2 weeks earlier wouldn’t explain the levels of k.