18."Russia's losses are quite high. And this month seems to be one of the biggest in terms of losses for Russia," Kesselmann told Estonian media EER.Russian troops continue to advance along the entire front line, made possible by constant shelling and so-called human wave infantry attacks, Kesselmann added.Russian attacks are currently most concentrated around Zelene and Kurakhove in the Pokrovsk sector of Donetsk Oblast. Meanwhile, Russian tactics have shifted recently to not entering the settlements, as this requires more "sophisticated" preparation, according to Estonian intelligence."Therefore, they besiege settlements with indirect fire. After the settlement is surrounded, they simply destroy it. It is a very cynical and disgusting thing," Kesselmann said.Russian troops have also advanced in the area of Chasiv Yar and the Lyman sector of the front line in Donetsk Oblast.