SINGAPORE/MOSCOW- * Spot premiums for June-loading Russian crude sold in Asia are holding steady at high levels, supported by firm demand for Dubai-linked grades, trade sources said on Thursday

* ONGC sold 700,000 barrels of Sokol crude loading between June 29 and July 5 at a premium close to $5.80 a barrel to BP BP.L , traders said

* Surgutneftegaz has sold three June-loading ESPO cargoes between June 6 and June 10, June 10-14 and June 15-19 at $3.45-$3.50 a barrel above Dubai quotes, they said

* Gunvor bought, on behalf of CNOOC, two cargoes loading on June 6-10 and June 15-19, while Shell took the cargo loading on June 10-14, traders said

* Brent's premium to Dubai crude touched the widest since January 2016 this week, lifting demand for Middle East and Russian grades priced on Dubai

(Reporting by Florence Tan and Olga Yagova; Editing by Tom Hogue and Sherry Jacob-Phillips) ((Florence.Tan@thomsonreuters.com; +65 6870 3497; Reuters Messaging: florence.tan.thomsonreuters.com@reuters.net))