Shell and the Italian oil firm Eni bought the block known as OPL 245 in 2011. Activists including the watchdog group Global Witness say the money ultimately went to a company secretly owned by a former Nigerian oil minister and never reached state coffers.
Global Witness and other groups filed a complaint in 2015 with the public prosecutor in Milan that the group says describes Shell’s role in the transaction.
Eni was already being investigated. Both firms have denied wrongdoing.
In a statement this week, Shell said officials searched its headquarters in The Hague in February and that it was cooperating with officials.
shellplc.website and its sister non-profit websites royaldutchshellplc.com, royaldutchshellgroup.com, shellenergy.website, shellnazihistory.com, royaldutchshell.website, johndonovan.website, shellnews.net and shell2004.com are owned by John Donovan. There is also a Wikipedia feature.