NPC Ukrenergo has said that Russian missiles hit several energy facilities all over the countries, as a result of which emergency power outages were introduced in all regions of Ukraine.

"It is a necessary step to protect the power grid from additional technological accidents and support operation of the energy system," the company said on Facebook on Tuesday.

Repair crews along with employees of the State Emergency Service of Ukraine will start repairs as soon as the air alarm is cancelled. However, Ukrenergo warned that repairs make take longer than usual due to frosty weather and icing.