Police have arrested an American citizen working as a teacher at an English-speaking school in Krabi province who is wanted under an arrest warrant issued in the United States on drug charges.
The arrest of Alexander Jonathan Rosen, 36, was in response to a request from the United States embassy to national police chief Pol Gen Chakthip Chaijinda, Immigration Bureau chief Pol Lt Gen Nathaporn Prohsunthorn said at a media briefing on Wednesday.
Pol Gen Chakthip subsequently ordered an investigation which found that Mr Rosen had entered and left Thailand on several occasions.
He first arrived in Thailand via Suvarnabhumi airport on Oct 31, 2015 and left through the same airport on Nov 2 of the same year.
Mr Rosen re-entered Thailand on May 24, 2016 via Krabi airport and left on July 22 through the Sadao immigration checkpoint in Songkhla Province.
On July 26 he again entered Thailand via the Sadao checkpoint and departed on Oct 15 from Krabi airport.
He returned to Thailand via Krabi on Oct 23 last year.
Police investigators also reported that Mr Rosen on Sept 14 submitted an application to the Krabi immigration office for a temporary stay in Thailand to work as an English teacher at an international school in Krabi.
Attached to his request were copies of a work permit, a letter certifying his employment, a permit for a foreign national to work as a teacher, and a medical certificate.
The Krabi immigration office granted him permission to stay in Thailand until July 30, the last day of his employment period.
Police went to Krabi and arrested Mr Rosen on Wednesday morning.
He was subsequently brought to Bangkok for legal proceedings pending extradition to the US.