KYIV, Dec 15 (Reuters) - Ukraine"s government will extend COVID-19 restrictions for another three months, to March 31 from end-December, because of low levels of vaccination, Prime Minister Denys Shmygal said on Wednesday. "Until the level of vaccination in Ukraine reaches 70% of the population, we must adhere to all imposed restrictions," Shmygal said at a televised government meeting. According to Ukrainian health ministry data, 12.6 million people have received two shots of COVID-19 vaccines out of a population of 41 million, while 3.6 million cases of infection and about 92,000 deaths have been registered.