March 26, 2022 GMT https://apnews.com/article/russia-ukraine-biden-europe-poland-016d40fcd3a4c37e52ca7de00c3694ad As President Joe Biden visited Poland on Saturday and called for Western unity against the Russian invasion of Ukraine, rockets hit the city of Lviv in western Ukraine, sending waves of fear into a place of refuge for hundreds of thousands of people fleeing. other parts of the country. In Lviv, the nearest large Ukrainian city to Poland, dense black smoke could be seen from the site of the first explosion for hours before a second series of explosions could be heard. People were housed underground after the explosions. Full Coverage: Photo The blasts occurred while Biden was in the Polish capital, Warsaw, about 340 kilometers (210 miles) away. The images of the American president visiting Ukrainian refugees and humanitarian aid workers in Poland contrast with the images of flames being fired from the blast sites and people being trapped in bomb shelters in Lviv.