Venezuela claimed a group traveling on speedboats and embarking from Colombia tried to land before dawn in the northern coastal state of La Guaira but were intercepted by the military and special police units.
There are confirmed case reports in the United States and Canada, but none in Latin America.
The head of US diplomacy, Mike Pompeo, will meet on Monday in Colombia with the Venezuelan opposition leader Juan Guaidó, on his first stop of a three-day trip to Latin America and the Caribbean.
A dozen countries working on ways to end Venezuela's crisis on Thursday gave their backing to opposition leader Juan Guaido as parliamentary speaker, rejecting the claims of a rival.
Of the nearly 4.5 million people who have fled Venezuela, 1.4 million are in Colombia.
After meeting Friday with his rival in the ballot last Sunday, Daniel Martinez, Lacalle Pou met with the President of Costa Rica, Carlos Alvarado, who is visiting the country.
The protests come amid social upheaval across South America, as a wave of unrest over the past two months has battered governments in Chile, Bolivia and Ecuador.
The deadliest clashes occurred Friday in the central city of Cochabamba, where nine people were killed in a confrontation between Morales backers and the security forces.