Once again, the city of Lvov became contested territory, and at the end of World War I, Jews were caught in the middle as Poles and Ukrainians fought for control of eastern Galicia. Pogroms broke out in 1917 and 1918, leaving over 100 Jews dead and hundreds more wounded, as mobs burned and looted homes.

http://www.jewishvirtuallibrary.org/jsource/vjw/Lvov.html