Russian forces pressed their assault on Ukrainian cities Friday, with new missile strikes and shelling on the capital Kyiv and the outskirts of the western city of Lviv, as world leaders pushed for an investigation of the Kremlin’s repeated attacks on civilian targets, including schools, hospitals and residential areas.

The early morning barrage of missiles on the outskirts of Lviv were the closest strike yet to the center of the city, which has become a crossroads for people fleeing from other parts of Ukraine and for others entering to deliver aid or fight.