In an online statement, the bank promised to "take adequate measures" to support targeted institutions. Russia's state-owned VTB bank, Russia's second-largest, was down 1.2 per cent today.
Other major banks that were left unscathed by sanctions, such as the country's largest, Sperbank, were trading higher.
US officials yesterday said that roughly 30 per cent of Russia's banking sector assets are now constrained by sanctions.
The move comes after Malaysia Airlines Flight 17 was shot down over eastern Ukraine. Western officials accuse pro-Russian separatists of bringing down the plane with a missile supplied by Moscow.
Western officials insist the new sanctions will damage an already struggling Russian economy. The International Monetary Fund has slashed Russia's growth forecast for this year to nearly zero, down from 1.3 per cent last year, and the US says more than USD 100 billion in capital is expected to flow out of the country.
It remained uncertain whether the tougher penalties would have any impact on Russia's actions in Ukraine, nor was it clear what further actions the US and Europe were willing to take if the situation remains unchanged. In the nearly two weeks since the Malaysia Airlines plane was felled in eastern Ukraine, Russia appears to have deepened its engagement in the conflict, with the US and allies saying that Russia was building up troops and weaponry along its border with Ukraine.
EU President Herman Van Rompuy and the president of the European Commission, Jose Manuel Barroso, said the sanctions sent a "strong warning" that Russia's destabilisation of Ukraine could not be tolerated.
