Alexander Stryk, the head of the military administration of Severodonetsk, said on Sunday that Ukraine remains in full control of one-third of the city.
"It is very dangerous to leave even the surrounding settlements," he warned, adding that the medical workers will remain at hospitals to provide necessary care.
Severodonetsk, the acting administrative center of the Lugansk Oblast, has found itself at the center of Moscow's military operation, with the British Defence Ministry claiming earlier on Sunday that Russia is using its over-match in force ratio and artillery to gradually seize the territory.