On Wednesday, government and banking officials had discussed “transactions that may be linked to the purchase of weapons and military supplies and the Myanmar government”, Thai foreign affairs spokesman Nikorndej Balankura said in a statement.
The Bank of Thailand and the anti-money laundering office “will jointly establish a Task Force to investigate these transactions”, he said.
He did not give details on a timeframe for the investigation.
The coup, which ended a short-lived experiment with democracy, plunged the Southeast Asian nation into turmoil.
Across swaths of the country, the junta is battling established ethnic minority armed groups as well as pro-democracy “People’s Defence Forces”.
Rights groups accuse the junta of committing possible war crimes as it struggles to crush opposition to its coup.
More than 5,400 people have been killed and 27,000 arrested in the junta’s crackdown since 2021, according to local monitoring groups.