US Secretary of State John Kerry said there was "no justification" for the military coup in Thailand.
"This act will have negative implications for the US-Thai relationship, especially for our relationship with the Thai military," Kerry said in a statement.
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The actress and The Only Way Is Essex star Mark Wright will become husband and wife over the Bank Holiday weekend.
The annual event has earned a place in the record books ahead of the grand final of the 60th anniversary show in Austria this evening.
Local authorities said the move is necessary to "avert the growing number of deaths and increasing harm linked to psychoactive substances".