The crew of a Contships Management boxship attacked by pirates off Nigeria have thwarted the attack, but the manager is calling for armed guards to be allowed on board to save lives.

Contact was lost with the 1,100-teu Contship New (built 2007) on Friday, 230 nautical miles (426 km) south-west of Bonny in Nigeria.

The ship was boarded, but its crew retreated to the citadel.