FRANKFURT, Germany – A spokesman for Montel Williams says the television personality was detained by customs officials at an airport in Germany after inadvertently leaving prescription marijuana powder in his luggage.

Jonathan Franks tells The Associated Press that Williams was held for about an hour Friday morning at the airport in Frankfurt while traveling on vacation. Franks says Williams was let go after showing a doctor’s note verifying the marijuana was for medicinal purposes. Franks says Williams was neither arrested nor cited.

Frankfurt airport police and the city’s customs office were not immediately reachable late Friday, and there was no immediate response to an emailed query.

The 60-year-old Williams suffers from multiple sclerosis and has been an outspoken advocate of medical marijuana, which he uses to help manage pain.