The Thai reports, published on Tuesday, said Washington would announce new sanctions on Myanmar Foreign Trade Bank and Myanmar Investment and Commercial Bank as early as Wednesday.
A spokesman for Myanmar's military junta said it was not worried about any new sanctions.
Zaw Min Tun told the state media channel MWD on Tuesday evening that the country has experienced sanctions before and they will not face losses if there are new sanctions on Myanmar state-owned banks.
He said the United States was "just doing this to cause difficulties in economics and politics".
One of the Thai media reports, by Bangkok Business News, cited Thai sources as saying the sanctions would impact Thailand and other countries in the region financially because of connections with local banks.
Persons:
Washington, Aung, Kyi, Min Tun, Critics, Prayuth Chan, Panu, Poppy McPherson, Kay Johnson, Raju Gopalakrishnan, Simon Cameron, Moore
Organizations:
United, Myanmar Foreign Trade Bank, Myanmar Investment, Commercial Bank, Reuters, Embassy, Bangkok Business, Thai, Thomson
Locations:
BANGKOK, United States, U.S, Thailand, States, Myanmar, Bangkok, Pattaya, ASEAN