MOSCOW, June 22 (Reuters) - A top Russian official warned the West on Wednesday to stop talking about triggering NATO's "Article 5" mutual defence clause in a standoff between Lithuania and Russia. Moscow has promised practical retaliation that will affect Lithuania's population after the Baltic state blocked the transit of goods subject to EU sanctions from Russia to its Baltic exclave. "I would like to warn Europeans against dangerous rhetorical games on the topic of conflict," the Interfax news agency quoted Russian Deputy Foreign Minister Sergei Ryabkov as saying on Wednesday.