The 46,000–dwt Torm Gertrud (built 2002) was attacked and shot at by gunmen after it had left Lagos on 9 September.
The Borsen daily said a speedboat caught up with the vessel in a 20-minute incident.
The master ordered water cannons to be used as he increased speed and carried out evasive manoeuvres.
Non-essential crew mustered in the citadel.
Several attempts by the pirates to board failed.
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