“This is unacceptable,” he added.
WATCH: Conservatives call for Canadian peacekeeping mission in eastern Ukraine
He reiterated Russia’s position that Ukrainian authorities should negotiate with Kremlin-backed rebels through “honest and direct dialogue.”
“There is no other way to solve the internal Ukrainian conflict.”
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The leaders of France and Germany, two other countries involved in the Minsk talks called Saturday for honouring the ceasefire and working for peace.
“There is no alternative to an exclusively peaceful settlement of the conflict,” German Chancellor Angela Merkel and French President Emmanuel Macron said in a statement issued by the Elysee, referring to “the recent unacceptable increase of ceasefire violations”.
‘Right to buy weapons’
For its part Ukraine welcomed Washington’s announcement, saying it would help contain “the aggressor.”
“Finally!” Ukrainian Ambassador to the United States Valeriy Chaly wrote on Facebook.
“Our strategic partners — the United States — have definitively made up their mind: as a sovereign state, Ukraine has a legitimate right to buy and receive defensive weapons including lethal weapons,” he said.
“Weakness provokes the aggressor. Strength contains him,” he added.
Despite a new ceasefire, Ukrainian military spokesman Vasyl Labay accused rebels of shooting at government positions and seeking to thwart the latest truce.
Senior rebel representative Eduard Basurin told local reporters that attacks by government troops had decreased but added that the Kiev army still tried to provoke the rebels into opening return fire.
Since the start of the conflict over three years ago more than 10 such ceasefires have been declared but all of them have been violated.
Ukraine and its Western allies accuse Russian President Vladimir Putin of funnelling troops and arms across the border to fan the flames of the conflict as punishment for Kiev’s pivot toward Europe.
More than 10,000 people have died and almost 24,000 have been injured since the pro-Russian insurgency broke out in eastern Ukraine in April 2014.
A UN report said this week that 220,000 children are at imminent risk of being hurt by mines and other explosive weapons in eastern Ukraine, one of the most mine-contaminated places on earth.
Moscow has denied the claims of involvement, saying the conflict is Ukraine’s internal affair and Kiev should negotiate directly with separatists.
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