At least 1 arrest made in connection to Matthew Perry's death, law enforcement source says

LOS ANGELES (AP) — 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.