Sanctions are also being imposed on Russia's oil and gas industry

In pursuance with a White House spokesman, the U.S. government is considering imposing sanctions on Russia's oil and gas industry.

The impact of such sanctions on world markets and energy prices in the US is currently being scrutinized.

In an interview with MSNBC, Psaki said Washington and key U.S. partners in the West are almost ready to impose comprehensive sanctions on Moscow's energy sector.