South Korea's Hyundai Heavy Industries said Friday it has secured a $850 million order to build four LNG carriers for Malaysian oil company Petronas.

The world's largest shipbuilder said it would deliver the double-hulled LNG tankers from the second half of 2016.

The contract includes an option to order four additional LNG carriers, it said.

Hyundai said its total orders, including the deal with Petronas, have reached $20.7 billion so far this year, or 87 percent of its annual target of $23.8 billion.