There were also reports of explosions in the capital Kiev as the air defence was reportedly employed to counter the attacks.
The posts were made mainly during the U.S. East Coast business hours and in Arabic, Farsi and Russian.
Russia fired missiles at several cities in Ukraine early Monday, with air alerts sounding in many parts of the country, Ukrainian authorities said.
Telegram was accused of not properly handling user complaints about hate, crime and other punishable content.
The pro-Russian separatist authorities said the situation was tense, but their air defences had it under control.
“Russia has turned the entire Donetsk region into a dangerous hotspot for civilians as well. I call on everyone to evacuate.”
According to the latest information from the authorities, 59 people were injured and several dozen remain missing.
Belarus is to test its rapid response forces in an unannounced military manoeuvre, the European country’s Defence Ministry said on Wednesday.
The Ukrainian president added that most Russians would have to pay for Mr Putin’s government’s aggressive policies with poverty.
Ukraine said it has set up 11 escape corridors for its citizens in embattled cities.
