The master, chief officer, chief engineer, second engineer and third engineer were kidnapped, along with cash, from the Maersk-chartered 2,578–teu City of Xiamen (built 2008) on 26 April.
They were freed on Saturday.
The owner said the four Poles and a Russian had been looked after bycompany representatives in Nigeria and underwent medical check-ups.
“Despite difficult conditions while in captivity, they are in good health,” the company said.
They