From the BBC:
UK oil worker seized off Nigeria
Attacks on foreign workers are common in the oil-producing region
A Briton has been kidnapped from an oil ship off the Nigerian coast, company sources said.
The Foreign Office is investigating claims militants seized two expatriate oil workers – from the US and Britain – during an armed raid.
A spokesman for Petroleum Geo-Services, based in Norway, has confirmed two of its workers have been taken.
Another unnamed official said they were taken from the southern coast by gunmen, who sped away in boats.