Psaki's statement came after the Daily Beast's Josh Rogin reported Friday afternoon that the Kremlin had stopped all high-level talks between Russian and U.S. officials, citing diplomats close to Moscow.
Politico also reported Friday that Russia's Defense Ministry had ignored efforts from the Pentagon to set up a phone link between top military officials in the two countries.
Earlier Friday, President Obama spoke with European leaders who pledged to work together to toughen sanctions against Russia if Moscow did not take steps to de-escalate the crisis in Ukraine, where pro-Russian militants are seeking autonomy from Kiev.
The U.S. and allies are pressing Russia to follow through on a diplomatic deal reached in Geneva last week and call on the separatists to stand down and to begin walks with the interim government in Kiev.
“The leaders underscored that Russia could still choose a peaceful resolution to the crisis, including by implementing the Geneva accord,” the White House said.