Editor's Note: This is a developing story and is being updated.
Russian forces launched missile and drone attacks overnight on June 22, targeting critical energy infrastructure in multiple Ukrainian regions.
Ukraine's Energy Ministry said that energy transmission systems were attacked in southern and western regions of Ukraine, causing damage to equipment.
In Zaporizhzhia Oblast, two energy workers sustained injuries and were transported to hospital as a result of the attack, grid operator Ukrenergo wrote on social media.
In Lviv Oblast, a Russian missile struck a energy infrastructure facility causing a fire to break out, Governor Maksym Kozytskyi reported.
No information was immediately available as to the extent of the damage in Lviv Oblast. Emergency crews are currently on-scene extinguishing the blaze.
In unspecified eastern regions, overhead powerlines were disconnected to "decrease in load on the generating facility," according to Ukraine's Energy Ministry.
Restoration crews are currently working to assess and repair damaged infrastructure.
Elsewhere, in the city of Ivano-Frankivsk, shattered windows were reported at a kindergarten as well as a residential building, Mayor Ruslan Martsinkiv reported.
Explosions were heard in the northwestern city of Lutsk in Volyn Oblast, and over Vinnytsia Oblast around 4:45 a.m local time, Suspilne reported.
Residents also reported hearing sounds of explosions around 5:30 a.m. local time in the city of Khmelnytskyi, according to Suspilne.
Ukraine's Air Force warned of missile threats on Ukraine's western and central regions. At 4:50 a.m. local time, Poland announced that it had scrambled military jets to protect Polish airspace amid the Russian attack in western Ukraine.
In recent months, Russia has intensified its attacks against Ukraine's critical infrastructure in a renewed assault against the country's energy grid.
As a result of the attacks on energy infrastructure, Ukraine began implementing rolling shutdowns on May 15, but they have dramatically increased in recent days.
Read also: Ukraine war latest: Ukraine claims attack on 4 refineries, Shahed drone storage sites in Russia