The charterer of the detained Gourdomichalis brothers ship is moving to seize the more than 51 metric tonnes wheat on board, accusing its owners of breach of contract.

Greek shipbroker Medmar filed suit last week in Oregon federal court, alleging subcharterers of the 52,500-dwt Vigorous' (built 2005) owe them $3.4m for breach of contract and want the cargo held until they pay up.