The Iranian tanker Forest arrived Tuesday at a Venezuelan port carrying 275,000 barrels of gasoline, and the Fortune vessel pulled into Venezuelan waters on Wednesday, said Russ Dallen, head of the Miami-based investment firm Caracas Capital Markets, who tracks Venezuela shipments.

The Faxon — the third Iranian tanker en route — is expected to reach the South American nation this weekend, Dallen said, adding that the flotilla is delivering an estimated 815,000 total barrels of fuel.