Rosneft's German unit reports cyber attack- media reports

FILE PHOTO: The shadow of a worker is seen next to a logo of Russia's Rosneft oil company at the central processing facility of the Rosneft-owned Priobskoye oil field outside the West Siberian city of Nefteyugansk, Russia, August 4, 2016. REUTERS/Sergei Karpukhin

BERLIN (Reuters) - The German subsidiary of the Russian energy company Rosneft has reported a hacker attack, die Welt newspaper reported on Sunday, citing the country's BSI cybersecurity watchdog.

The paper said the BSI had offered support to overcome the problem, which occurred on Friday night or early Saturday morning, and had issued a cybersecurity warning to other companies in the energy sector.