Vessel does not appear to be on list of US-sanctioned vessels, which would represent escalation in blockade

US forces on Saturday apprehended a second merchant vessel carrying oil off the coast of Venezuela in international waters in the midst of an American blockade against the country’s oil, according to the US homeland security department.

The stoppage follows the seizure by US forces of another oil tanker off Venezuela’s coast on 10 December. Both vessels were headed to Asia.