Shipowner Lumar is appealing for the release of a Ukrainian captain who has spent six weeks in a Greek prison.
The Hellenic Coast Guard (HCG) detained the 1,042-teu Mekong Spirit (built 1996) on 24 May after intelligence suggested the ship was carrying explosives from Turkey to Sudan.
HCG said in an announcement that this was in violation of United Nations (UN) and European Union (UN) sanctions.
