Ukraine’s president is warning that Russia is planning more mass strikes on its energy infrastructure as officials over the weekend urged civilians to stock up on essentials and brace for a cold winter.

Frustrated and facing setbacks from Ukrainian troops, Russia has turned with increasing fury on civilians, seeking to undermine Ukraine’s morale by pummeling power stations and other basic infrastructure with drone and missile attacks.

“We also understand that the terrorist state is concentrating forces and means for a possible repetition of mass attacks on our infrastructure. First of all, energy”, - said Volodymyr Zelensky.

The strikes have left 40% of Ukraine’s power grid damaged or destroyed and officials have imposed rolling blackouts to keep it from failing.

Ukrainian officials said that the destruction of infrastructure in towns and cities near the front and in recently liberated areas could lead to half a million newly displaced people seeking refuge in other parts of the country.