Pirates off the coast of Nigeria attacked an oil tanker Monday evening and abducted the ship's Ukrainian captain as well as a Greek engineer, Greek authorities said Tuesday. The attack on the MT ALTHEA was orchestrated by a group of ten armed pirates, Reuters reports, who then fled the scene in a speedboat with their two captives. "We are doing everything we can for their release," an official from Piraeus-based Medtankers Management, the ship's operator, said. "They kidnapped the two men but did not touch the cargo (oil) or injure anyone." Piracy off the Nigerian coast has increased by a third this year, Reuters points out, as West African countries provide minimal protection to commercial ships, and crew members are attractive ransom targets. [Reuters](http://stats.wordpress.com/b.gif?host=world.time.com&blog=19871253&post=123547&subd=timeglobalspin&ref=&feed=1)