Contact has been lost with a bunker tanker in the Gulf of Guinea as the pirate threat remained critical in the region.
The incident comes as piracy reporting bodies also said a suspicious skiff approached a tanker owned by Norway's Kristian Gerhard Jebsen Skipsrederi (KGJS).
The last known position of the 400-dwt bunker ship Stelios K (built 1995) was 40 nautical miles (74 km) south of Lome in Togo on Monday morning.
