"We assess that Russia continues to provide them with heavy weapons, other military equipment, and financing, and continues to allow militants to enter Ukraine freely. The United States has no evidence that Russia's support for the separatists has ceased," the Department of State said in a statement on Monday.
Moreover, according to the statement, Russia continues to mass its troops near the Ukrainian border, including "more advanced air defense systems". "We are concerned much of this equipment will be transferred to separatists, as we are confident Russia has already delivered tanks and multiple rocket launchers to them from this site," reads the statement. White House press secretary Josh Earnest said in Washington, DC that new sanctions could be imposed on Russia if it does not take additional steps to resolve the Ukrainian conflict. "As long as they fail to contribute in a substantive way to de-escalate in that conflict they are only increasing the risk that the international community will impose further costs and further isolate Russia," Earnest said, adding that Washington and Brussels were trying to show Moscow that it would have to answer if it does not change its attitude towards Ukraine. Earnest reminded that the United States and the EU were calling on Russia to withdraw its troops from the border, ensure the cessation of arms supplies to militants and persuade them to lay down their arms. "There is evidence that Russia is not doing enough to stop illegal arms shipments to eastern Ukraine," the White House spokesman said.