One of the 10 mostly French hostages seized last week off Cameroon's coast was killed in a failed rescue attempt, a militia leader said Wednesday, according to The Associated Press. The unidentified hostage was killed when Nigerian marines attacked the militia in Cameroon's Bakassi Peninsula, militia commander Ebi Dari said. Bakassi is part of Cameroon, and it was not clear why security forces from neighboring Nigeria would be involved. Nigerian and Cameroonian officials could not immediately be reached for comment, reported The AP. Dari said he did not know the identity of the slain hostage and did not say when he died. Gunmen in speedboats seized six French workers, two Cameroonians, one Senegalese and one Tunisian from an oil-industry tugboat off Cameroon's coast Friday. France later said a seventh hostage also had French nationality, but it was not known which one. Stephanie Elbaz, spokeswoman for maritime services company Bourbon that owns Bourbon Sagitta _ from which the hostages were taken _ said the company has no comment on the report.