A total of 230 contract workers at the U.K.'s South Hook liquefied natural gas terminal in southwest Wales, are on strike Monday, a spokesperson at the terminal said in an e-mailed statement.

"I can confirm that approximately 230 of the contract construction workforce working on the build of Phase 2 at the South Hook terminal near Milford Haven have walked off site today."

"We understand this action is linked to the recent industrial relations activity at the Lindsey Oil refinery."

The workers are "taking steps" to resolve the matter with their contract employees, the statement said adding, normal operations at terminal aren't affected by the industrial action.

South Hook is owned by three shareholders, Qatar Petroleum is has the majority stake owning 67.5% of the terminal, while Exxon Mobil Corp. (XOM) and Total SA (TOT) hold 24.15% and 8.35% respectively.

-By Reza Amanat, Dow Jones Newswires; 44 (0)20 7842 9487; reza.amanat@dowjones.com