Updated

The Latest on the conflict in Syria (all times local):

12:05 p.m.

President Vladimir Putin's spokesman says the Kremlin regrets a "more than modest" reaction by the international community following the deadly attack on a Russian military hospital in the Syrian city of Aleppo the previous day.

Dmitry Peskov singled out the United States on Tuesday for what he said was a muted reaction to the "tragedy" in the besieged Syrian city. Two Russian nurses were killed in the attack.

Russian officials have said the artillery attack was deliberately planned and suggest that the coordinates of the hospital were supplied to rebels in Aleppo by a foreign power.

Russia's Defense Ministry says a statement from the International Red Cross about the incident was "cynical" and showed the organization was "indifferent to the murder of Russian medics in Aleppo."

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11:55 a.m.

The Syrian government says it rejects any cease-fire for embattled Aleppo unless it includes the departure of all rebels from the eastern part of the city.

Syria's Foreign Ministry says in a statement carried on the state SANA news agency on Tuesday that the government won't allow the rebels a chance to "regroup and repeat their crimes" in the divided city.

The statement comes a day after Russia and China blocked a draft resolution at the U.N. Security Council demanding a seven-day truce in Aleppo.

The Britain-based Syrian Observatory for Human Rights says rebel shelling of Aleppo's government-held districts killed 81 civilians in the past three weeks. The government's offensive to take eastern Aleppo killed 341 civilians over the same period and displaced tens of thousands over the past week.