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

2:45 p.m.

Russia's Foreign Ministry is sharply criticizing the United States as being obstructive and deceptive regarding the airstrike by coalition warplanes on a Syrian military position that killed more than 60 soldiers.

A ministry statement on Sunday said that in an emergency U.N. Security Council session called following the airstrike, the United States took "an unconstructive and indistinct position."

The Americans "not only turned out to be unable to give an adequate explanation of what happened, but also tried, as is their custom, to turn everything upside down," the statement said.

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11:45 a.m.

Syria's state news agency is reporting that troops have regained control of areas they lost to the Islamic State group in the east of the country after an airstrike by the U.S.-led coalition.

SANA quotes an unnamed military official as saying Sunday that dozens of IS fighters were killed in the offensive under the cover of Syrian airstrikes.

The Syrian military official said government troops had regained control of areas the extremists captured, "as a result of the American aircraft aggression."

The U.S. military said it may have unintentionally struck Syrian troops while carrying out a raid against IS on Saturday.

Russia's military said it was told by the Syrian army that at least 62 soldiers were killed in the Deir el-Zour air raid and more than 100 wounded.