Russian President Vladimir Putin has blasted an agreement by G7 leaders to use frozen Russian assets to help Ukraine as “theft” and promised retaliation. He said Western powers were still trying to “create at least some legal basis” for the decision taken on Thursday. “But despite all the fuss theft will remain theft. It will not go unpunished,” he said in a speech at the Foreign Ministry in Moscow, according to the TASS news agency. The G7 summit began on Thursday in southern Italy with a deal to lend Ukraine $50 billion using the interest generated from frozen Russian state assets. The money…