Oman's Renaissance Services Co is in talks to sell three of its subsidiaries as parts of plans to focus on its core business of oil and gas, its chief executive officer said.

The company plans to sell one of the units by the end of December and the other two next year, Stephen Thomas said, declining to name the units or the expected value of the deals.

The units up for sale are in the fields of training, media and technology, which in addition to marine and engineering, and contract services, make up its business.

"We are still in negotiations with companies...we are going to concentrate on our core business, and those three subsidiaries do not fit our plans," Thomas told Reuters in Muscat. He did not name possible suitors.

The company said in March it planned to invest $500 million in the next three years mainly to acquire gas and oil support vessels. - Reuters