A Reuters reporter visited some of the market vendors at Donetsk Trauma Center.
Marina Klimenko, 27, lost her left foot. She said she and her husband who was also wounded tried to crawl away.
"I have a young child. I am a crippled person now. I do not know. I just want this nightmare to come to an end," Marina added trying to keep her tears.
The doctors did not to waste the "golden hour", the important minutes within which they managed to save the patients' lives, chief doctor of Donetsk Trauma Center Andrey Boryak told reporters.
"The surgeries on some of the patients have been completed late at night because they needed quite a lengthy time to perform," Boryak said.
Pushilin announced a day of mourning on Monday in the Donetsk People's Republic, the name given to the part of the region Russia says it has annexed.
In his nightly video address, Ukrainian President Volodymyr Zelenskiy did not address the attack but said that in a single day, Russia had shelled more than 100 cities, towns and villages in nine regions in Ukraine, and that the attacks in Donetsk region had been "particularly severe."
In Moscow, the Russian Foreign Ministry called the attack "a barbaric act of terrorism" by Ukraine that was carried out "with the use of weapons supplied by the West."
The city of Donetsk has been under Russian control since 2014, but Ukrainian troops continue to hold positions on its outskirts and the city regularly comes under artillery fire.
