Two south Louisiana companies that serve the oil and gas industry have notified the Louisiana Workforce Commission about possible layoffs affecting nearly 300 workers.

Gulf Island LLC in Houma, which fabricates offshore rigs and other structures, said it may be forced to lay off its 227 workers beginning June 10 if it is unable to win bids on upcoming projects. The company said it hopes the layoffs are temporary.

Carbo Ceramics, which provides products and services for the fracking industry that helps dislodge oil and gas from shale formations, said it will temporarily close its New Iberia plant beginning June 17. That will put the 61 employees out of work. Carbo said it’s shutting down its plant because of market conditions and business needs.

Gulf Island LLC is a subsidiary of Gulf Island Fabrication.

“Management and our marketing department are working endlessly in an effort to pursue any and all potential jobs for Gulf Island Fabrication Inc. and its subsidiaries in order to aid our companies and overcome these challenging times,” the company said in a letter to the workforce commission.

Sustained low natural gas and oil prices have caused more than 15,000 Louisiana energy workers to be displaced, said Don Pierson, secretary for the department of Louisiana Economic Development.