BANGKOK, Aug. 8 (Xinhua) -- Twenty-six transnational drug suspects, some of whom being Thai females, have been arrested since last year at Thailand's airports where they were departing for Japan and South Korea.

Office of the Narcotics Control Board secretary general Sirinya Sitthichai said on Wednesday that the suspected traffickers of cocaine and crystal meth have been rounded up at Don Mueang and Suvarnabhumi airports since April 2017.

Among those unidentified drug suspects were a number of Thai females who were arrested at the international airports with a combined 27.6 kg of crystal meth hidden in their luggage last January, Sirinya said.

They had been allegedly used by drug dealers and disguised themselves as tourists to Japan and South Korea where they would have delivered the drugs, the ONCB chief said.

The suspected drug dealers who had allegedly employed those women as drug traffickers included two unidentified Nigerian nationals who were recently arrested on Koh Samui island in southern Thailand, he said.

The authorities have launched the Airport Interdiction Task Force to crack down on drug trafficking suspects at the international airports.