KYIV, Dec 14 (Reuters) - Russian forces firing multiple rocket launchers hit the regional administration building on the central square of the recently liberated southern Ukrainian city of Kherson on Wednesday, a senior Ukrainian official.Ukraine recaptured Kherson from Russian forces on Nov. 11, prompting days of celebrations on the square that President Volodymyr Zelenskiy visited days later to hail the end of the Russian occupation.Russian forces have been shelling Kherson from the opposite side of the Dnipro River since leaving the city and withdrawing from the western bank of the river.Some windows appeared to have been smashed, though the structure of the building looked intact.An unconfirmed video circulating on Telegram showed a huge plume of smoke pouring up from the top of the administration building."