Crew members on a Greek product tanker boarded by pirates in the Gulf of Guinea are said to be safe in the vessel's citadel.

Security company Dryad Global told TradeWinds the seafarers remained mustered in the safe room on board the 10,700-dwt Maria E (built 2007) on Wednesday.

The vessel is adrift about 40 nautical miles (74 km) northwest of Sao Tome island.