MINSK- Belarusian state oil firm Belneftekhim said on Thursday that no new contaminated oil had been found in tests on Belarusian territory and that it was looking into an isolated discovery of contaminated oil by Poland's pipeline operator.

Russian pipeline monopoly Transneft said on Thursday that more contaminated oil had been found at a section of the Druzhba pipeline from Belarus to Poland, the RBC media portal reported.

Belneftekhim said it was continuing to transport oil towards Poland and that it planned to finish clearing up the third line of the Druzhba pipeline by the end of July.

(Reporting by Andrey Makhovsky, Polina Ivanova; writing by Tom Balmforth; editing by Alexander Smith) ((Tom.Balmforth@thomsonreuters.com;))