That's according to a video from an online conversation between the leaders of the three states, an Ukrinform correspondent reports.
"There is information from our intelligence and the intelligence of our partners that covert mobilization is going on [in Russia]," Zelensky said.
Zelensky also said that the situation in eastern Ukraine is difficult.
In addition, he noted that the Russians continue to use air strikes against Ukrainian cities.
At the same time, Zelensky thanked Duda and Caputova for their support, assistance and strong advocacy for Ukraine's EU integration movement in the EU member states.
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