Venezuela, Bolivia and Nicaragua say the US is using the international relief operation in Haiti as a cover-up for a military takeover.
Bolivian President Evo Morales said that he will request an emergency UN meeting to reject what he calls the US military occupation of Haiti.
"It's not right that the United States should use this natural disaster to invade and militarily occupy Haiti," Morales told a press conference on Wednesday.
"If you have all these problems with the injured and the dead from the earthquake, you have to go there to save lives, and you don't do that from a military standpoint," he added.
An outspoken critic of US policies, Venezuelan president Hugo Chavez also had accused Washington of occupying Haiti "under the guise of the natural disaster."
Nicaragua also has taken a similar stance toward US with respect to the situation in Haiti.
The United States is deploying up to 20,000 troops to Haiti. US servicemen have taken control of the country's international airport.