Hmmm, I pray the Nigerian Navy get into action fast enough, to be able to free both the ship and the hostages, why would Nigerian pirates even attempt to hijack a foreign ship. Hope this does not dent Nigeria and Poland business relationship.
The Polish Consulate in the Nigerian capital, Abuja, has confirmed that a cargo ship carrying 16 Poles has been hijacked by Nigerian pirates. Cargo ship 'Szafir' (Sapphire).
The ship, named Szafir (Sapphire), had been sailing from the Belgian port of Antwerp to Onne in Nigeria,and it belongs to Polish company Euroafrica, based in Szczecin, north western Poland. It is understood that the Nigerian navy is engaged in a rescue operation. A woman whose husband is apparently on-board the vessel has told Poland’s TVN 24 station that
“more than a dozen sailors locked themselves in the engine room and turned off the engines.”

Source: http://www.juicygossips.com.ng/2015/11/nigerian-pirates-hijack-polish-ship-16.html