A containership came under fire off Nigeria on the same day a bulker was boarded at anchorage in Guinea.
Piracy reporting bodies said a boxship was attacked by a single skiff carrying up to 10 gunmen 30 nautical miles south-east of the Egina Terminal, Nigeria, on 27 March.
Security consultancy Dryad Global said the vessel was the 4,380-teu Lana (built 2010), operated by Marlow Navigation of Cyprus.