People gather in a basement, used as a bomb shelter, during an air raid in Lviv, Western Ukraine, Saturday, March 19, 2022. Lviv has been a refuge since the war began nearly a month ago, the last outpost before Poland and host to hundreds of thousands of Ukrainians streaming through or staying on. (AP Photo/Bernat Armangue)
A worker feeds a newborn baby in a basement converted into a nursery in Kyiv, Ukraine, Saturday, March 19, 2022. Nineteen surrogated babies were born to surrogate mothers, with their biological parents still outside the country due to the war against Russia. (AP Photo/Rodrigo Abd)
Ukrainian refugees talk near a special application point at the National Stadium in Warsaw, Poland, on Saturday. Hundreds of refugees from Ukraine waiting in line to apply for Polish ID numbers that will entitle them to work, free health care and education. (AP Photo/Czarek Sokolowski)
LVIV, Ukraine — Russian forces pushed deeper into Ukraine’s besieged and battered port city of Mariupol on Saturday, where heavy fighting shut down a major steel plant and local authorities pleaded for more Western help.