Reports coming in of hundreds of Russian mobilised troops killed in Ukrainian missile attack

Several hundred Russian mobilised troops may have been killed in Donetsk city of Makiivka as a result of a Ukrainian missile attack, as reported by various Telegram channels.
Representative of Ukrainian armed forces strategic communications wrote on their Telegram channel that up to 400 Russian troops were killed are 300 were injured.

Pro-Russian Tsargrad Telegram channel writes about several hundred killed,

whereas another pro-Russian channel Operativnije svodki writes about 500 killed.
The mobilised troops were stationed in a building of a university. On New Year’s night it was hit by a Ukrainian missile launched from HIMARS system. Russian military blogger Boris Rozhin wrote on his channel that clearing of rubble continued on Sunday evening.
Also read: Russians continue attacks as new year begins