Five people were killed in an attack in Cameroon on a boat carrying guards for an offshore oil field operated by French firm Perenco SA, according to the Associated Press. The attack late Tuesday night came as the vessel operated at an oil field abutting Nigerian territorial waters, possibly signaling that militants waging attacks in recent days from that country''s oil-rich Niger Delta may have targeted the crew. However, no militant group immediately claimed responsibility for the assault. The attack killed three Cameroonian soldiers and two private Cameroonian security contractors as they motored through Perenco''s Moudi oil field. The oil-rich Gulf of Guinea is increasingly becoming a target for pirate attacks, mainly from Nigeria and Cameroon. Areas around Cameroon''s nearby Bakassi Peninsula, where militias have been fighting with government troops since Nigeria ceded the land to Cameroon in 2006, remain prone to piracy and attacks.