TEHERAN - Iran summoned the Swiss ambassador, who represents U.S. interests in the Islamic Republic, over possible measures America could take against an Iranian fuel shipment to Venezuela, the Mehr news agency reported.

A senior official in U.S. President Donald Trump’s administration said on Thursday the United States was considering measures it could take in response to Iran’s shipment of fuel to crisis-stricken Venezuela.

Iran’s Deputy Foreign Minister Abbas Araqchi passed on a message to the ambassador on Sunday warning against any U.S. threat against the Iranian tankers, according to a report on the foreign ministry website.