DUBAI  - Saudi Arabia's Crown Prince Mohammed bin Salman is inaugurating the $4.2-billion expansion of the S-Oil refinery in South Korea, Aramco's chief executive told Al-Arabiya Television on Wednesday.

(Writing by Nafisa Eltahir; Editing by Clarence Fernandez) ((Nafisa.Eltahir@thomsonreuters.com; +971 56 22 61754;))