Russia targeted Ukraine’s already battered infrastructure with drones, rockets and cruise missiles on Friday, raining fire on cities around the country one day after President Volodymyr Zelensky wrapped up a twoday push in Europe for more, faster support from Kyiv’s allies.

On the ground, Russia has been increasing the pace of its winter offensive, with forces supported by fighter jets attacking across the eastern front, according to Ukraine’s military. Military analysts have said that Russia has made small tactical gains over the past week — often at great cost — but as of Friday morning there was no evidence of a major breakthrough.

The Ukrainian Air Force said that Russia was using a combination of Iranian-made drones, surface-to-air missiles and cruise missiles fired in waves on Friday to evade air defence systems.

Since October, Russia has launched more than a dozen major strikes on Ukraine’s energy facilities, as well as many smaller attacks, in a campaign to impair the power supply and leave civilians without power, heat and light during the winter.

The full extent of the damage of the strikes on Friday was not clear, but energy infrastructure was hit in six regions of the country, according to Ukraine’s energy minister, Herman Galushchenko.

“Emergency shutdowns have been introduced in many regions,” he said, adding that energy workers were racing to restore supply.

The state-owned power utility, Ukrenergo, confirmed damage to several high-voltage infrastructure sites in the eastern, western and southern regions of Ukraine.

Over Kyiv, Ukrainian fighter jets raced across the sky to intercept inbound missiles, and air defence systems thundered. Ten missiles were shot down over the city, and power transmission lines were damaged, according to the mayor, Vitali Klitschko.

During the first wave of air attacks, around 4am (local time), Ukraine shot down five of seven drones launched from the eastern coast of the Sea of Azov and five of six Kalibr sea-based cruise missiles fired from a the Black Sea, the country’s Air Force said.

Russia also launched a large attack of nearly three dozen S-300 anti-aircraft missiles from Belgorod in Russia and the occupied city of Tokmak in southern Ukraine, towards targets in Kharkiv and Zaporizhzhia.