US President Joe Biden cast doubt on Russia's signal that it may scale down its war aims to concentrate on eastern Ukraine, as two Russian missile strikes slammed into the west of the country on Saturday, wounding five. After failing to break Kyiv's ferocious resistance in a month of fighting and deadly attacks on civilians, the Russian army in a surprise announcement said it would focus on "the main goal -- the liberation of Donbas". But Biden said he was "not sure" that Moscow has indeed changed strategy, as he branded Russian President Vladimir Putin a "butcher" while meeting Ukrainian refugees in Poland. The US leader assessment came as two missiles struck a fuel depot in western Ukraine's Lviv, a rare attack on a city just 70 kilometres (45 miles) from the Polish border that has escaped serious fighting since Russian troops invaded last month. At least five people were wounded, regional governor Maksym Kozytsky said, as AFP journalists in the city centre saw plumes of thick black smoke. Putin sent troops into Ukraine on February 24, vowing to destroy the country's military and topple pro-Western President Volodymyr Zelensky. But his army has made little progress on...