A South Korean businessman faces charges of breaching national security laws by allegedly supplying a North Korean restaurant tied to the country’s spy agency with  $20,000 worth of cash and goods — including underwear and drugs.

The transactions took place in a North Korean restaurant in Southeast Asia that the man frequented more than 100 times over the course of seven years, according to the head of the Seoul Metropolitan Police’s national security investigation team.

Seoul police arrested the 52-year-old man who works in the IT sector on Oct. 13, the investigator Choi Seung-min told NK News.

According to