A Chinese man has been arrested on suspicion of illegally operating a mobile phone base station without a license in busy entertainment districts in central Tokyo, the Metropolitan Police Department said.

Yu Hai, a 31-year-old Chinese national living in Tokyo’s Kita Ward, is alleged to have installed radio equipment in a vehicle and operated an unlicensed base station in Tokyo’s Ginza district on Saturday, the police said.

He has denied the allegations against him, reportedly telling investigators, “I’ve never used any radio equipment before. I don’t know anything about it.”