"Due to the smear campaign against us that the US Administration has begun... We reject the unfounded public insinuations that US deputy State Department spokeswoman Marie Harf is spreading on a daily basis," a statement by the Russian foreign ministry said.
Harf yesterday said that latest evidence suggests that Russian troops are firing artillery from within Russia on Ukrainian military across the border, while defence officials suggested that Moscow is supplying the pro-Russian rebels with equipment like rocket launchers.
"There are no facts or specifics about these falsehoods," the statement said, accusing Washington of essentially trying to "shield their Kiev wards and themselves" by obscuring the "real reasons for events in Ukraine."
Moscow has denounced the protests in Kiev which led to former president Viktor Yanukovych's ouster as a US-sponsored regime change and alleged that the current leadership wants to eliminate the Russian-speaking population in eastern Ukraine, where Ukraine's army has been fighting an insurgency since April.
The foreign ministry accused the United States of supporting the "coup" in Ukraine and "pushing" it toward "cruel reprisals against the Russian-speaking population."
