“Among these networks is the one led by alleged Lao drug kingpin Puxana Singnawong,” Pol General Dr Suwira Songmetta said on Wednesday.

He was speaking after he led a raid on the Power Exchange shop in Pathumwan district.

The operation, which found two large safety boxes and several computers, was conducted under a search warrant approved by the Criminal Court.

Suwira said the raid took place after evidence suggested Sirikarn Kullawat, who was arrested with her husband Yossawat Weerachaiphaksiri earlier this month, had operated a currency-exchange business as a front to facilitate financial transfers for drug suspects. “Available evidence shows she had allegedly taken orders to transfer drug suspects’ money via social media and got the commission equivalent of 0.8 per cent of the transferred amount,” he said.

He said Sirikarn, who owns a wholesale fruit and vegetable business, had taken over the currency exchange business in February.