By Natalia Zinets and Mari Saito LVIV, Ukraine (Reuters) -Four rockets hit the western Ukrainian city of Lviv on Saturday, local officials said, in the most significant attack on the city since the start of the war with Russia. Lviv, just 60 kilometres (40 miles) from the Polish border, has so far escaped the heavy bombardment and fighting that has devastated some Ukrainian cities closer to Russia since Moscow launched its invasion on Feb. 24. Governor Maksym Kozytskyy said five people had been wounded after two rockets hit a fuel depot and two others later hit a military factory. Earlier he r…