Three vessels named as among 19 being detained by Houthi rebels in Yemen have left the country.
Satellite data shows that Greek owner Evalend Shipping's 20,000-dwt tanker Volante (built 2008) was underway with armed guards on board on 28 April.
It had been stuck in Hodeidah since 26 March with a 16,300-dwt diesel cargo, according to Saudi Arabia, which is leading a coalition against the Houthis.
