British Prime Minister Boris Johnson warned about the growing humanitarian crisis due to the Russian invasion of Ukraine on Tuesday (March 1), saying refugee numbers could run into millions as people flee their homes. “"Putin is prepared to use barbaric and indiscriminate tactics against innocent civilians, to bomb tower blocks, to send missiles into tower blocks, to kill children, as we're seeing in increasing numbers," he stressed. Johnson met in Warsaw with his Polish counterpart Mateusz Morawiecki, who said at a press conference that the main goal of Poland's humanitarian efforts was preventing further bloodshed.