HOUSTON: A tanker subject to U.S. sanctions carrying some 300,000 barrels of naphtha from Russia entered Venezuelan waters late ​on Thursday, while another began redirecting course in the Atlantic Ocean, ship tracking data showed, a reflection of diverging last-minute decisions by ship owners after President Donald Trump ordered a "blockade" of oil tankers under sanctions bound for the OPEC country earlier this week.

The move ramped up pressure on Venezuelan president Nicolas Maduro by targeting the country's main source of income and followed the seizure by the U.S. of an oil tanker off the coast of Venezuela earlier in December.

Vessels that were not subject to sanctions began setting sail on Wednesday from Venezuelan waters after a week's pause, helping drain the country's mounting crude stocks.

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