A private security official says gunmen in Nigeria have kidnapped three expatriate workers after attacking a supply ship near a Chevron Corp offshore oil field.
The official said on Friday the attack happened about 70 nautical miles offshore from Bayelsa state in Nigeria's oil-rich southern delta.
The official did not immediately know the nationalities of those taken.
The official spoke to The Associated Press on condition of anonymity as they did not have authorisation to speak to journalists.
A Chevron spokesman confirmed the kidnapping today, saying it happened last night.
An amnesty deal in the oil delta in 2009 stopped many attacks, but some worry the programme is beginning to unravel in Nigeria, a crucial crude oil supplier to the US.