The Russian border region of Belgorod came under heavy fire from Ukraine on Saturday, resulting in at least 21 deaths and dozens of injuries, a day after Moscow launched a massive aerial assault on multiple Ukrainian cities. Belgorod Governor Vyacheslav Gladkov said the Ukrainian army had fired on the centre of the regional capital of the same name as he told residents to hide in air raid shelters. Gladkov said on Telegram that 21 people, including three children, were killed in the shelling and a further 110 people were injured, 30 of them seriously. The information could not initially be ind…