Russia investigating 13 suspects in oil contamination case - RIA

MOSCOW (Reuters) - The number of suspects Russia is investigating over a major oil contamination in the Druzhba pipeline earlier this year has risen from 10 to 13, RIA news agency reported on Friday, citing a lawyer for one of the suspects.

Russia's Transneft pipeline monopoly said earlier this month that four suspects in the case worked for its Transneft-Druzhba subsidiary, while six other people had also earlier been accused of involvement.

(Reporting by Andrey Kuzmin, Anton Kolodyazhnyy; Writing by Tom Balmforth; Editing by Jan Harvey)