Russian oil major, Rosneft has slammed a $1.4bn lawsuit against a consortium led by oil supermajor, ExxonMobil. Rosneft has filed the suit in a local arbitration court, alleging the consortium, which is working on the Sakhalin-1 project, of “unjust enrichment” in 2015, demanding payment of $1.41bn. Analysts see the lawsuit further deteriorating foreign investor appetite in Russia’s energy industry, which is already in a miserable state due to western sanctions.