One worker was killed in an accident at oil company Rosneft's Komsomolsk refinery located in Russia's Far East, the refinery's press-service said in emailed statement on Tuesday.
The worker was from a contractor firm working on the site, it added. The refinery added in a detailed statement later on Tuesday that the accident had occurred during tests at a pipeline which was undergoing maintenance works.
Production at the site was unaffected, it said.
(Reporting by Natalia Chumakova; writing by Katya Golubkova)