The U.K. says it has information that Moscow is plotting to install a pro-Russian leader in Kyiv, as fears of an invasion of Ukraine persist.

The assertions, offered without a timeline on the intelligence, were contained in a U.K. Foreign Office statement Saturday as tensions over Russian activity around Ukraine continue to build.

Yevhen Murayev, a former Ukrainian member of parliament, is a potential candidate, according to the statement. In Washington, a National Security Council spokeswoman called the alleged plotting ¡°deeply concerning.¡± President Joe Biden also met with his national security team on Saturday to discuss continued Russian aggression toward Ukraine, according to a White House official.