Venezuela President Nicolas Maduro hit out at the United States on Friday for "stealing" billions of dollars and offering "crumbs" in return as humanitarian aid.
Tons of US aid is piling up in Colombia close to the border with Venezuela as opposition leader Juan Guaido has vowed to defy Maduro's efforts to block the supplies from entering the country.
"It's a booby trap, they're putting on a show with rotten and contaminated food," said Maduro, speaking at an event in the southeastern town of Ciudad Bolivar.
"They've stolen $30 billion and are offering four crumbs of rotten food," added the beleaguered socialist leader, referring to the United States.
Venezuela is in the midst of an economic crisis that has left millions in poverty and facing shortages of basic necessities such as food and medicine.
Guaido, who is recognized by 50 countries as the interim president, accuses Maduro of causing economic hardship through mismanagement.
Among those countries is Costa Rica, whose foreign affairs ministry on Friday gave three Maduro-appointed diplomats "60 calendar days" to leave the country.
Maduro meanwhile blames Venezuela's woes on US sanctions, claiming they have cost the country $30 billion.
The 56-year-old, the hand-picked successor to socialist firebrand Hugo Chavez, branded it the "war of the oligarchy."
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