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.
More top news
According to local reports, the repairman had failed to disconnect the power to the escalator before getting to work.
Millwall fans who caused problems at the match against Barnsley could face lifetime bans, the club said.
Counter-terrorism forces, backed by Shi'ite militias on the ground and coalition airstrikes, are moving into the city on several fronts.