Chiba prefectural police and Narita airport customs officials have arrested three men, including an airport security guard, over smuggling amphetamine into the country by using a special pass that allows access to restricted areas.

Hideki Taniyama, 46, an employee of International Service Center, a security firm based here, and two unemployed men in their 30s were arrested for smuggling 6.5 kg of stimulant drugs with an estimated street value of 390 million yen.

It is the first drug smuggling arrest involving the use of a pass that allows staff to access restricted areas at a Japanese airport, according to the customs officials.

Police also confiscated another 1 kg of stimulants from the house of another person connected to the case and believe they have uncovered a large smuggling ring.