(Adds details, background)
PARIS, Jan 7 (Reuters) - French oil services firm Bourbon GPBN.PA said on Wednesday nine crew members were released unharmed in Nigeria along with their hijacked vessel, which had been captured by unknown gunmen in speedboats on Sunday.
Bourbon did not say how it obtained the release of the vessel, the Bourbon Leda, and its crew -- five Nigerians, two Ghanaians, one Cameroonian and one Indonesian.
Piracy and kidnappings for ransom are common in Nigeria’s oil producing Niger Delta.
“Bourbon announces that the Bourbon Leda vessel and its nine crew members, captured off the coast of Nigeria in the night of Saturday to Sunday, have been freed. All nine crew members are in good health,” the company said in a statement.
Bourbon thanked Nigerian authorities for their help but gave no details of the terms of the men’s release.
The Bourbon Leda, a fast supply intervention vessel, was seized off Bonny Island, in the Niger Delta, where a major crude export terminal and a liquefied natural gas plant are located.
Security sources in Nigeria had said the vessel was on its way to a Royal Dutch Shell RDSa.L offshore oilfield at the time of the attack.
The Niger Delta, a vast network of mangrove creeks opening into the Gulf of Guinea, is home to Africa’s biggest oil and gas industry but supplies have been crippled by a wave of attacks that began in early 2006.
Militants who say they are fighting for a fairer distribution of the delta’s oil wealth have blown up pipelines and kidnapped oil workers, shutting down about a fifth of Nigeria’s output.
Criminal networks have taken advantage of the insecurity to carry out kidnappings and hijackings for ransom. Hundreds of foreigners have been seized over the past three years, but most have been released unharmed after a financial settlement.
Ten crew members of another Bourbon vessel that was hijacked on Oct. 31 last year off Cameroon, just south of the Niger Delta, were released unharmed on Nov. 11. (Reporting by Estelle Shirbon; Editing by Louise Ireland)
Our Standards: The Thomson Reuters Trust Principles.