The United States and the EU are working on alternative gas supplies to EU countries in case that Russia attacks Ukraine, U.S. President Joe Biden and European Commission President Ursula von der Leyen said in a joint statement released on Friday.

"The United States and the EU are working jointly towards continued, sufficient, and timely supply of natural gas to the EU from diverse sources across the globe to avoid supply shocks, including those that could result from a further Russian invasion of Ukraine," the officials said in the joint statement.

According to the document, the United States is now the largest supplier of liquefied natural gas (LNG) to the EU. "We are collaborating with governments and market operators on supply of additional volumes of natural gas to Europe from diverse sources across the globe," Biden and von der Leyen said in the statement.

The document focuses on the role of LNG, which "in the short-term can enhance security of supply."

"The European Commission will work for improved transparency and utilization of LNG terminals in the EU. We intend to work together, in close collaboration with EU Member States, on LNG supplies for security of supply and contingency planning. We will also exchange views on the role of storage in security of supply," the officials said.

They called on all major energy producer countries to join them "in ensuring world energy markets are stable and well-supplied."

According to the statement, this work has already started, and we will take it forward at the meeting of the U.S.-EU Energy Council on February 7.