Immigration police arrested John Andrew Tiangson, 35, and his wife Eena Bianca Marie Cruz, 30, on Tuesday at a house on Soi On Nut 65, immigration police said on Wednesday.
Their arrest followed advice from authorities in the Philippines that customs officers had intercepted a parcel containing 10 kilogrammes of dried cannabis in February this year. The parcel had been sent from Thailand to Manila.
According to police, dried marijuana could sell for about 975 baht per gramme in the Philippines. The seized cannabis had an estimated street value of 10 million baht in Manila.
The package had been sent via a parcel service in Bangkok, he said.
Investigators learned that the parcel had been sent by a Philippine couple. Further checks found they had overstayed their visas by nine years.
The couple will face legal action and deportation and would be blacklisted by immigration for 10 years.
