Toyota's highest ranking woman executive until her arrest in Japan on suspicion of drug law violations has been released from custody.

Japanese media reports say Julie Hamp will not face charges. The American was released Wednesday.

Hamp resigned last week from Toyota Motor Corp.

She was arrested June 18 on suspicion of bringing oxycodone, a narcotic pain killer, into Japan. The drug is tightly controlled in Japan.

Hamp, 55, was appointed three months ago as the head of public relations at the Japanese automaker, in a high-profile move that was highlighted by the Japanese automaker as promoting diversity.

Police say the drug was founded in a package that was mailed to her from the U.S. She was arrested at a Tokyo hotel where she had been staying.