More than one million in Ukraine without power after Russia attacks energy network

More than one million Ukrainians have been left without power, following a "massive" Russian attack on Ukraine's power grid

Explosions have been reported across the country, from Kharkiv in the east to Lutsk in the far west and Odesa in the south

Authorities in Kyiv say the attack lasted almost nine and a half hours

Engineers have begun to repair damage to infrastructure, but Ukrainians have been warned that emergency power shutdowns could last until the evening

This is the second attack on the country's energy system this month, writes the BBC's Paul Adams in Ukraine, with temperatures falling

Russia has repeatedly attacked Ukraine's electricity network during the war

Ukraine's President Volodymyr Zelensky has just made his first comments since Russia's overnight attack.

"The target is our energy sector," he says in a post on Telegram, with the attack involving about "about 100 strike drones, more than 90 missiles of different types".

"In several regions, Kalibr [missiles] with cluster munitions were used specifically against civilian infrastructure.

"These cluster munitions make it significantly more difficult for our rescuers and energy workers to eliminate the impact of the strikes, and this is a vile escalation of Russian terrorist tactics."

Zelenksy adds that the latest attacks prove the need for Ukraine to have adequate air defence systems.