“The Kingdom of Eswatini has no connection whatsoever to the vessel reported to be seized in Iran, and we reject in the strongest terms any attempts to associate our country with maritime criminality,” it said in a statement.

Iranian forces regularly target tankers that Tehran accuses of illegally transporting fuel in the Strait of Hormuz.

Earlier in November they captured a Marshall Islands-flagged tanker in the geographically pivotal waters.

The authorities said “the tanker was in violation for carrying unauthorised cargo” without providing specifics.

The incidents have come as tensions between Iran and the West have continued to mount over the country’s nuclear programme.

Widespread United Nations sanctions, including an arms embargo, against Iran were reinstated in September, following the collapse of nuclear negotiations.

Omani-mediated talks between Iran and the United States collapsed in June after Israeli and American strikes on Iran, bringing diplomatic progress to a halt.

Tehran maintains that its nuclear programme is peaceful and denies any intention to develop nuclear arms.

The reimposed sanctions were a “snapback” mechanism from the 2015 nuclear agreement, which had suspended penalties in exchange for restrictions on Iran’s nuclear programme.