The Kropotkinskaya facility of the Caspian Pipeline Consortium--which transports oil from Kazakhstan's Tengiz field to the Russian Black Sea port of Novorossiysk, where tankers are loaded for global distribution--was struck by several drones and taken out of service on Monday.

Kazakhstan will seek contact with Ukraine in order to avoid any repeat of this week's Ukrainian drone strike in southern Russia that hit a pumping station of the main Kazakh oil export pipeline, an official was quoted as saying on Wednesday.