State Department spokeswoman Marie Harf said that the United States was also reviewing the rest of US aid to Thailand -- which totaled some USD 10.5 million in 2013 -- to look for further cuts.
"We have already suspended approximately USD 3.5 million" in funding and training for the Thai military, Harf told reporters.
"We are reviewing all programmes to determine other assistance which we may suspend," she said.
Harf said that the United States was looking through its allocated funding for international bodies including the 10-nation ASEAN bloc to identify money directed to Thailand.
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Secretary of State John Kerry earlier strongly condemned yesterday's coup, saying there was "no justification" and that the move would have "negative implications" for relations.
Kerry urged the restoration of a civilian government, respect for press freedom and early elections.
Thailand is the oldest US ally in Asia and provided critical support in the Vietnam and Korean wars.