Moscow - Sputnik. According to the maps, sirens sounded in the indicated provinces as of 00.51 Moscow time.Earlier, the White House Strategic Communications Coordinator, John Kirby, announced that America highly appreciates the risk of losing Ukraine in the conflict without additional assistance from the American side.Kirby told reporters commenting on the possibility of no decision by the US Congress to provide additional assistance to Kiev: Kirby noted that US President Joe Biden will reaffirm during the Group of Seven summit scheduled to be held virtually today, America's commitment to supporting Ukraine.Attacks on Ukrainian infrastructure by the Russian armed forces began on October 10, two days after the terrorist attack on the Crimean bridge, behind, according to Russian authorities, Ukrainian security services.Russian forces are launching strikes on energy facilities, defense industry and military command. Since then, airstrike sirens have sounded in Ukrainian provinces every day, sometimes throughout the country.