CHRONOLOGY: Nigerian militant attacks on oil industry

(Reuters) - A British oil worker was kidnapped from an offshore drilling rig in Nigeria on Saturday, officials and industry sources said.

Following is a chronology of some major attacks and kidnappings involving the Nigerian oil industry this year.

January 12, 2007 - Nine South Korean workers and one Nigerian are freed after being kidnapped when gunmen attacked a base operated by South Korea's Daewoo Engineering and Construction in the Bayelsa state capital, Yenagoa, on January 10.

-- January 16 - Three people, including a Dutch oil worker, are killed when their boat, operated by South Korean firm Hyundai, is attacked on its way to the Bonny Island export terminal.

-- January 18 - Gunmen free five Chinese telecom workers, kidnapped on January 5 in Rivers State. One Italian is released in Bayelsa state. Three foreigners remain in captivity.

-- January 23 - Gunmen kidnap two engineers, one American and one British, in the southern oil city of Port Harcourt. The Briton is released on February 7 and the American on Feb 17.

-- January 27 - A Belgian man working for a building materials company dies of gunshot wounds after gunmen ambushed him in Warri in the western Delta.

-- February 4 - Nine men working for the Chinese National Petroleum Company (CNPC), which was doing work for Shell in Bayelsa state, are released. They were kidnapped on January 25.

-- February 6 - Gunmen abduct a Filipino worker on the road