A 32-year-old truck driver surnamed Lam was arrested at the Lok Ma Chau checkpoint for drug possession at about 6.15am yesterday. The man was stopped as he returned to Hong Kong. Officers seized 3kg of ketamine with a street value of HK$384,000 from the vehicle. Police believed the man was a dealer who supplied drugs to entertainment venues in West Kowloon. The man has been detained for further questioning.