The deadliest day yet in the Ukraine crisis on Friday saw heated words between Western allies and Russia at the U.N.

(SOUNDBITE)(English) VITALY CHURKIN, RUSSIA'S AMBASSADOR TO THE UNITED NATIONS, SAYING:

"In supporting those who perpetrated the coup d'etat in Kiev, in tapping out the protesters, the U.S. and E.U. bear great responsibility in destroying the path to a peaceful resolution to the crisis."

(SOUNDBITE)(English) MARK LYALL GRAND, UK AMBASSADOR TO THE UNITED NATIONS, SAYING:

"Russia's synthetic indignation over Ukraine's proportionate and measured actions convinces no-one."

(SOUNDBITE)(English) SAMANTHA POWER, U.S. AMBASSADOR TO THE UNITED NATIONS, SAYING:

"The fact that Ukraine has taken some steps to try to restore order is to be expected."

A spokesman read out a statement from U.N chief Ban Ki-moon calling for calm.

(SOUNDBITE)(English) STEPHANE DUJARRIC, UNITED NATIONS SPOKESMAN, SAYING:

"He therefore urges all sides t