l major Chevron and are demanding a ransom for the release of the vessel and its crew, the army said on Wednesday. Military spokesman Lt. Col. Sagir Musa said the unidentified hijackers were demanding 30 million naira (US$254,539) in ransom for the release of the vessel and its 11-person crew, who included two foreigners, one Portuguese and one Ukrainian. The armed men seized the ship, the Lourdes Tide, late on Tuesday, in the latest in a series of recent militant attacks and sabotage in the world's eighth-largest oil exporter that have helped pushed world oil prices to new record highs.